Please note that this is a general FAQ for the error "Parser Error Message: Could not load type..."
You get this error because you did not
publish your .net project via Visual Studio so the .net bin folder and the
required DLLs wasn't created.
The best solution for this is
1) Publish the application to your local machine and then upload it via ftp including the bin folder.
Or
2) Use your Visual Studio and publish the
application directly to your site. (This require you to have a working
url that's already pointed to our server. Frontpage extension need to enable on this URL, too)