Could not load Assembly........

I am using to VS2008 and am wondering if anyone can help me with this problem.
When I publish my website and test it, it runs perfect from local host but then when I publish it to the webserver.
on my local system, I am working on Windows XP but the web Server is running, Windows Server 2003, IIS6 and .NET 2.0.
I get this error - Could not load the assembly 'App_Web_default.aspx.cdcab7d2.dll'. Make sure that it is compiled before accessing the page. 
This assembly is also exist in the bin folder. Does anyone know what the problem could be and how to fix it? as soon as possible
Thank you,
Imran
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