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I get a SQL Connection error even if I'm not connecting to it

I have this old asp.net application that I've been using for years, for some reason after I press the login button I get this error:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

The funny thing is that the login routing ends well but this errors keeps appearing, so I made a new clean web project (vs 2010), get into the login screen, enter a fake user name and password, press login and it keeps loading for a minute apparently looking for some server, and after that I get the error.

If I look for the specific error in Google I get lots of forums on it, but they are for the real symptom when you're actually trying to connect somewhere, since I'm not doing and connection its really hard to find a solution
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yuval08
Asked:
yuval08
1 Solution
 
Jini Jose.Net Team LeadCommented:
i think you have uploaded the same web.config as in your local computer. just write the connection string in top of the page. then check
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JayFromPepCommented:
is the sql server available?  even if you are running it on your machine, the application has to know where to go to do the validation.

The membership provider could be jacked up.

Those are a couple of things that come to mind quickly.
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Jini Jose.Net Team LeadCommented:
do one thing, just create a new page, and onload, write the connection string in the response. then on a butotn click event open the connection.
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yuval08Author Commented:
this is my web.config file, in the login method I create a regular SqlConnection object and run my routing, it works great, then I execute FormsAuthentication.RedirectFromLoginPage after the user validation and then that error appears and no where in my routing I'm trying to open another sql connection
<?xml version="1.0"?>
<configuration>
	<appSettings>
		<add key="sqlConnStr" value="Server=MyServer;Initial Catalog=MyDB;uid=MyUser;pwd=MyPassword;"/>
	</appSettings>
	<connectionStrings/>
	<system.web>
		<compilation debug="true" targetFramework="4.0">
		</compilation>
		<authentication mode="Forms">
			<forms loginUrl="login.aspx"/>
		</authentication>
		<authorization>
			<deny users="?"/>
		</authorization>
		<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web>
</configuration>

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Jini Jose.Net Team LeadCommented:
is your user validation or user login page contains any sqldatareader ?
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Vikram Singh SainiSoftware Engineer cum AD DeveloperCommented:
Just trying to solve it either way. You said, " in the login method I create a regular SqlConnection object"

Is your connection object is closed or are you maintaining same connection object to be use later in your application.
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yuval08Author Commented:
It was just as I thought, it required SQL Express to be installed in order to run thanks guys anyway...
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