There's a Page Load Exception in the Event Viewer:
AssemblyVersion: 6.0.1
PortalID: 0
PortalName: MyPortal
UserID: 1
UserName: host
ActiveTabID: 62
ActiveTabName: Alpine
RawURL: /LinkClick.aspx?link=sports%2falpine200.gif&tabid=62&mid=616
AbsoluteURL: /LinkClick.aspx
AbsoluteURLReferrer: http://mydomain.com/raceinfo/alpine.aspx
UserAgent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: f226d41f-1b9b-4c7b-818b-1552c77a361a
InnerException: The file '/LinkClick.aspx' does not exist.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Web.Compilation.BuildManager.GetVPathBuildResultInternal
StackTrace:
Message: DotNetNuke.Services.Exceptions.PageLoadException: The file '/LinkClick.aspx' does not exist. ---> System.Web.HttpException: The file '/LinkClick.aspx' does not exist. at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) at System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace ---