visio editor

Question

hi
i need to a disgner visio in aspx page for edit visio file
and i search into google and i find this sample :
http://www.codeproject.com/Articles/17365/ASP-NET-2-0-Visio-Custom-Control

and create a new project and a new web form and drag ShowVisio into page
and in code behind set my path:

ShowVisio1.FilePath =

but when i run it nothing display to me

please help me

thanks

@"E:\visioFile\test1.vsd";