I have a problem whenever I try to create a link. (Or any popup for that matter.) Is there a configuration setting I don't know about that will fix this?

Full text of the error is below the image...




Exception Details: System.NotSupportedException: The given path's format is not supported.

[NotSupportedException: The given path's format is not supported.]
   System.Security.Util.StringExpressionSet.CanonicalizePath(String path, Boolean needFullPath) +230
   System.Security.Util.StringExpressionSet.AddExpressions(String[] str, Boolean checkForDuplicates, Boolean needFullPath) +461
   System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList) +401
   System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String[] pathList, Boolean checkForDuplicates, Boolean needFullPath) +43
   System.IO.Path.GetFullPath(String path) +82
   System.Web.HttpApplication.CheckSuspiciousPhysicalPath(String physicalPath) +19
   System.Web.Configuration.HttpConfigurationSystem.ComposeConfig(String reqPath, IHttpMapPath configmap) +175
   System.Web.HttpContext.GetCompleteConfigRecord(String reqpath, IHttpMapPath configmap) +434
   System.Web.HttpContext.GetCompleteConfig() +49
   System.Web.HttpContext.GetConfig(String name) +195
   System.Web.CustomErrors.GetSettings(HttpContext context, Boolean canThrow) +20
   System.Web.HttpResponse.ReportRuntimeError(Exception e, Boolean canThrow) +39
   System.Web.HttpRuntime.FinishRequest(HttpWorkerRequest wr, HttpContext context, Exception e) +486