Ok... I´ll try
When I'm adding labels, textboxes and other controls (and often changing Name properties to this controls), sometimes the error that I've written before appears, is a simple messagebox showing the error but justan 'accept' button is shown, like I said before I'm using Microsoft Visual Studio 2005 professional and I've added the TaskPane.dll as reference to my project, generating this error...
I hope this explanation will be useful...
Thanks again...