Custom Membership Provider Problem

Hi there,
I'm writing a web app using C# and .NET 2.0 (corporate environment, so I can't use 4.0) and I'm running into an issue with custom membership providers.
Everything compiles, and looks like it should work, but I get this error when viewing the WSAT Security tab:
 Could not load type 'BinCSF.Security.CUser' from assembly 'App_Code.f4qdas9h, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
<membership> section of web.config: http://illogi.ca/l/snippets/bincsf_web_config.html
BinCSF.Security.UserProvider: http://illogi.ca/l/snippets/bincsf_userprovider.html
BinCSF.Security.CUser: http://illogi.ca/l/snippets/bincsf_cuser.html
Any help would be greatly apprecia ...