SSRS 2005 giving me "Invalid URI: The format of the URI could not be determined" when trying to customize it

I'm getting the error "Invalid URI: The format of the URI could not be determined" when customizing it. I've made several changes to the configuration files and UI, but I keep getting this error. It isn't logging it too in the event log nor the log files, which makes it very annoying to debug. So how do I figure out where the error is coming from? Is it with the URL that's pointing to the ReportServer2005.asmx file, or something else?

Updated: The specific error being logged is:

aspnet_wp!library!9!3/11/2010-15:52:49:: i INFO: Initializing WatsonDumpOnExceptions to default value of 'Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException,Microsoft.ReportingServices.Modeling.InternalModelingException' because it was not specified in Configuration file. aspnet_wp!library!9!3/11/2010-15:52:4开发者_JS百科9:: i INFO: Initializing WatsonDumpExcludeIfContainsExceptions to default value of 'System.Data.SqlClient.SqlException,System.Threading.ThreadAbortException' because it was not specified in Configuration file. aspnet_wp!library!9!3/11/2010-15:52:49:: i INFO: Initializing SecureConnectionLevel to default value of '1' because it was not specified in Configuration file. aspnet_wp!library!9!3/11/2010-15:52:49:: i INFO: Initializing DisplayErrorLink to 'True' as specified in Configuration file. aspnet_wp!library!9!3/11/2010-15:52:49:: i INFO: Initializing WebServiceUseFileShareStorage to default value of 'False' because it was not specified in Configuration file. aspnet_wp!ui!9!3/11/2010-15:52:52:: e ERROR: Invalid URI: The format of the URI could not be determined. aspnet_wp!ui!9!3/11/2010-15:52:53:: e ERROR: HTTP status code --> 500 -------Details-------- System.UriFormatException: Invalid URI: The format of the URI could not be determined.

at Microsoft.SqlServer.ReportingServices2005.RSConnection.GetSecureMethods()

at Microsoft.ReportingServices.UI.Global.RSWebServiceWrapper.GetSecureMethods()

at Microsoft.SqlServer.ReportingServices2005.RSConnection.IsSecureMethod(String methodname)

at Microsoft.SqlServer.ReportingServices2005.RSConnection.ValidateConnection()

at Microsoft.ReportingServices.UI.Global.SecureAllAPI()

at Microsoft.ReportingServices.UI.ReportingPage.EnsureHttpsLevel(HttpsLevel level)

at Microsoft.ReportingServices.UI.ReportingPage.ReportingPage_Init(Object sender, EventArgs args)

at System.EventHandler.Invoke(Object sender, EventArgs e)

at System.Web.UI.Control.OnInit(EventArgs e)

at System.Web.UI.Page.OnInit(EventArgs e)

at System.Web.UI.Control.InitRecursive(Control namingContainer)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) aspnet_wp!ui!9!3/11/2010-15:52:53:: e ERROR: Exception in ShowErrorPage: System.Threading.ThreadAbortException: Thread was being aborted. at System.Threading.Thread.AbortInternal() at System.Threading.Thread.Abort(Object stateInfo) at System.Web.HttpResponse.End() at System.Web.HttpServerUtility.Transfer(String path, Boolean preserveForm) at Microsoft.ReportingServices.UI.ReportingPage.ShowErrorPage(String errMsg) at at System.Threading.Thread.AbortInternal() at System.Threading.Thread.Abort(Object stateInfo) at System.Web.HttpResponse.End() at System.Web.HttpServerUtility.Transfer(String path, Boolean preserveForm) at Microsoft.ReportingServices.UI.ReportingPage.ShowErrorPage(String errMsg)

Thanks.