Server Application Unavailable in .NET Framework 2.0 and IIS V5.1

okay here's how it looks:
"Server Application Unavailable
The web application you are attempting to access on this web server is currently unavailable.  Please hit the "Refresh" button in your web browser to retry your request.

Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur. "






What happened:
I use Visual studio 2005 Express to develop a c# website. everything works fine on the server and even the developer server works on local machine. but when I setup a local web server using IIS 5.1 and .NET 2.0, it shows up this message in the browser.


















Then I did some search on google and reset the application start point to a sub directory, and I got another error message in my browser:
"Server Error in '/myApp' Application.
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Failed to access IIS metabase.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.Hosting.HostingEnvironmentException: Failed to access IIS metabase.

The process account used to run ASP.NET must have read access to the IIS metabase (e.g. IIS://servername/W3SVC). For information on modifying metabase permissions, please see http://support.microsoft.com/?kbid=267904.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace:


[HostingEnvironmentException: Failed to access IIS metabase.]
   System.Web.Configuration.MetabaseServerConfig.MapPathCaching(String siteID, VirtualPath path) +3591442
   System.Web.Configuration.MetabaseServerConfig.System.Web.Configuration.IConfigMapPath2.MapPath(String siteID, VirtualPath vpath) +9
   System.Web.Hosting.HostingEnvironment.MapPathActual(VirtualPath virtualPath, Boolean permitNull) +169
   System.Web.CachedPathData.GetConfigPathData(String configPath) +389
   System.Web.CachedPathData.GetConfigPathData(String configPath) +243
   System.Web.CachedPathData.GetApplicationPathData() +68
   System.Web.CachedPathData.GetVirtualPathData(VirtualPath virtualPath, Boolean permitPathsOutsideApp) +3536567
   System.Web.Configuration.RuntimeConfig.GetLKGRuntimeConfig(VirtualPath path) +189

 


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Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433 "








well, I am using windows XP, IIS V5.1, .NET 2.0, Visual Studio 2005 EE, IE6. Any comment to this matter is welcome! Thanks.
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