Hi all, 

I'm currently migrating an existing site to Umbraco and I'm having troubles to have my aspx pages (transformed to user controls) loaded in Umbraco. 

I followed the steps described here: http://en.wikibooks.org/wiki/Umbraco/Samples_and_Articles/Dot_Net_Controls/Using_Dot_NET_Controls_With_Umbraco

After the user control is added as a macro I'm getting an Exception when I click on "Browse Properties":  The relative virtual path 'usercontrols/TestUserControl.ascx' is not allowed here. at System.Web.VirtualPath.FailIfRelativePath(). 

I created a new blank project with one simple user control with only html in it and I still have the same problem. 

Here is the detailed track trace: 

System.ArgumentException: The relative virtual path 'usercontrols/TestUserControl.ascx' is not allowed here. at System.Web.VirtualPath.FailIfRelativePath() at System.Web.Hosting.HostingEnvironment.MapPathActual(VirtualPath virtualPath, Boolean permitNull) at System.Web.Hosting.HostingEnvironment.MapPathInternal(VirtualPath virtualPath) at System.Web.Hosting.HostingEnvironment.MapPath(VirtualPath virtualPath) at umbraco.IO.IOHelper.MapPath(String path, Boolean useHttpContext) at umbraco.IO.IOHelper.ValidateEditPath(String filePath, String validDir) at umbraco.developer.assemblyBrowser.Page_Load(Object sender, EventArgs e)

Any idea why I'm having this problem?

Kind regards.