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custom error won't redirect in asp.net

My web.config is....Any ideas why it won't be redirecting to Error.aspx

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

	<connectionStrings>
		****
	</connectionStrings>

	<location path="Quiz">
		<system.web>
			<authorization>
				<allow users="user"/>
				<deny users="*"/>
			</authorization>
		</system.web>
	</location>
	
	<system.web>
		<customErrors mode="On" defaultRedirect="Error.aspx" >
			
		</customErrors>
		<authentication mode="Forms">
			<forms path="/" loginUrl="~/Login.aspx" protection="All" timeout="2880"/>
		</authentication>
	</system.web>
	
	<system.webServer>
		<defaultDocument>
			<files>
				<clear/>
				<add value="default.aspx"/>
			</files>
		</defaultDocument>
	</system.webServer>
	<system.web>
		
		<sessionState mode="InProc" cookieless="false" timeout="30"/>
		<compilation debug="true" targetFramework="4.0">
			<assemblies>
				<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
				<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
				<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
				<add assembly="System.Speech, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			</assemblies>
		</compilation>
		<pages maintainScrollPositionOnPostBack="True" enableEventValidation="true"/>
		<httpHandlers>
			<add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false"/>
		</httpHandlers>
	</system.web>
	<system.webServer>
		<validation validateIntegratedModeConfiguration="false"/>
		<handlers>
			<add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource"/>
		</handlers>
	</system.webServer>
</configuration>

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I have exactly the same settings on another demo application which works fine. The web.config for that is

<?xml version="1.0"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
	<connectionStrings>
		<add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
	</connectionStrings>
	<location path="Secure">
		<system.web>
			<authorization>
				<allow users="user"/>
				<deny users="*"/>
			</authorization>
		</system.web>
	</location>
	<system.web>
		<customErrors mode="On" defaultRedirect="Error.aspx"/>
		<compilation debug="true" targetFramework="4.0"/>
		<authentication mode="Forms">
			<forms loginUrl="~/Account/Login.aspx" timeout="2880"/>
		</authentication>
		<membership>
			<providers>
				<clear/>
				<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
			</providers>
		</membership>
		<profile>
			<providers>
				<clear/>
				<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
			</providers>
		</profile>
		<roleManager enabled="false">
			<providers>
				<clear/>
				<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>
				<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>
			</providers>
		</roleManager>
	</system.web>
	<system.webServer>
		<modules runAllManagedModulesForAllRequests="true"/>
	</system.webServer>
</configuration>

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nishant joshiTechnology Development Consultant
BRONZE EXPERT

Commented:
you web config is same but once try to check web site configurations from

Web Site Administration Tool, on the Website menu, click ASP.Net Configuration

and check for error and set page.

Regards,
nishant

Author

Commented:
I am using IIS 7.5 Sorry where do you get website admin tool?
Technology Development Consultant
BRONZE EXPERT
Commented:
in visual studio..

Author

Commented:
i have tried setting the page through that tool. When I try to debug the application it won't debug. when i try to run without debugging i m getting this error

HTTP Error 500.23 - Internal Server Error
An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.

Author

Commented:
i worked it out by putting

<customErrors mode="On" defaultRedirect="~/Error.aspx" >

            </customErrors>

inside the last <system.web> web.config node. don't no why it has to be in the last node of <system.web> but it  is working now :s :)

Author

Commented:
Resolve web.config

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

	<system.webServer>
		<httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files">
			<scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" />
			<dynamicTypes>
				<add mimeType="text/*" enabled="true" />
				<add mimeType="message/*" enabled="true" />
				<add mimeType="application/javascript" enabled="true" />
				<add mimeType="*/*" enabled="false" />
			</dynamicTypes>
			<staticTypes>
				<add mimeType="text/*" enabled="true" />
				<add mimeType="message/*" enabled="true" />
				<add mimeType="application/javascript" enabled="true" />
				<add mimeType="*/*" enabled="false" />
			</staticTypes>
		</httpCompression>
		<urlCompression doStaticCompression="true" doDynamicCompression="true" />

		<!--<httpErrors errorMode="Custom" defaultResponseMode="ExecuteURL" defaultPath="~/default.aspx">

			<clear/>
			<error statusCode="404" responseMode="ExecuteURL" path="~/default.aspx/"/>
		</httpErrors>-->
	</system.webServer>

	<connectionStrings>

		*****

	</connectionStrings>


	<!--<system.net>
		<mailSettings>
			<smtp from="support@practicelifeintheuktest.co.uk">
				<network host="relay-hosting.secureserver.net"/>
			</smtp>
		</mailSettings>
	</system.net>-->




	<location path="Quiz">



		<system.web>

			<authorization>

				<allow users="user" />
				<deny users="*" />

			</authorization>

		</system.web>

	</location>

	<system.webServer>

		<defaultDocument>
			<files>
				<clear />
				<add value="default.aspx" />
			</files>
		</defaultDocument>
	</system.webServer>



	<system.web>
		<customErrors mode="On" defaultRedirect="~/default.aspx" >

		</customErrors>
		<authentication mode="Forms">
			<forms path="/" loginUrl="~/Login.aspx" protection="All" timeout="5" />
		</authentication>


		<sessionState mode="InProc" cookieless="false" timeout="30" />

		<compilation debug="true" targetFramework="4.0">
			<assemblies>
				<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
				<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
				<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
				<add assembly="System.Speech, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
			</assemblies>
		</compilation>
		<pages maintainScrollPositionOnPostBack="True" enableEventValidation="true" />
		<httpHandlers>
			<add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" />
		</httpHandlers>

	</system.web>


	<system.webServer>
		<validation validateIntegratedModeConfiguration="false" />
		<handlers>
			<add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" />
		</handlers>
	</system.webServer>
</configuration>

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nishant joshiTechnology Development Consultant
BRONZE EXPERT

Commented:
might having an problem with application pools in IIS check.Application pull .net version is 4.0 or not?