Getting NullReferenceException creating SqlConnection in .NET web application

[gui]

I am getting a \[code\]System.NullReferenceException\[/code\] exception in my web application:\[code\][NullReferenceException: Object reference not set to an instance of an object.]Home..ctor() in D:\Hosting\9651310\html\Home.aspx.vb:6ASP.home_aspx..ctor() in D:\Hosting\9651310\html\Home.aspx.vb:912304__ASP.FastObjectFactory_app_web_2ocmh1tt.Create_ASP_home_aspx() +47System.Web.Compilation.BuildResultCompiledType.CreateInstance() +32System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) +109System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +31System.Web.UI.PageHandlerFactory.GetHandler(HttpContext context, String requestType, String virtualPath, String path) +37System.Web.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +334System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184\[/code\]Here's the line that throws the exception:\[code\]Dim con As New SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings("Connection").ToString())\[/code\]The connection strings section of my web.config file looks like this:\[code\]<connectionStrings> <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" /> </connectionStrings>\[/code\]