Server Error in '/' Application.

Access to the temp directory is denied.  Identity 'IIS APPPOOL\ASP.NET v4.0 Classic' under which XmlSerializer is running does not have sufficient permission to access the temp directory.  CodeDom will use the user account the process is using to do the compilation, so if the user doesn�t have access to system temp directory, you will not be able to compile.  Use Path.GetTempPath() API to find out the temp directory location.

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.UnauthorizedAccessException: Access to the temp directory is denied.  Identity 'IIS APPPOOL\ASP.NET v4.0 Classic' under which XmlSerializer is running does not have sufficient permission to access the temp directory.  CodeDom will use the user account the process is using to do the compilation, so if the user doesn�t have access to system temp directory, you will not be able to compile.  Use Path.GetTempPath() API to find out the temp directory location.

ASP.NET is not authorized to access the requested resource. Consider granting access rights to the resource to the ASP.NET request identity. ASP.NET has a base process identity (typically {MACHINE}\ASPNET on IIS 5 or Network Service on IIS 6 and IIS 7, and the configured application pool identity on IIS 7.5) that is used if the application is not impersonating. If the application is impersonating via <identity impersonate="true"/>, the identity will be the anonymous user (typically IUSR_MACHINENAME) or the authenticated request user.

To grant ASP.NET access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the ASP.NET account, and check the boxes for the desired access.

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: 


[UnauthorizedAccessException: Access to the temp directory is denied.  Identity 'IIS APPPOOL\ASP.NET v4.0 Classic' under which XmlSerializer is running does not have sufficient permission to access the temp directory.  CodeDom will use the user account the process is using to do the compilation, so if the user doesn�t have access to system temp directory, you will not be able to compile.  Use Path.GetTempPath() API to find out the temp directory location.]
   DTcms.Common.SerializationHelper.Load(Type type, String filename) +458
   DTcms.DAL.siteconfig.loadConfig(String configFilePath) +31
   DTcms.BLL.siteconfig.loadConfig() +266
   DTcms.Web.UI.HttpModule.ReUrl_BeginRequest(Object sender, EventArgs e) in e:\project\lianmeiweb\DTcms - 2013\DTcms.Web.UI\HttpModule.cs:44
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +80
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +270

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1040