Plugin with references not working on CRM 2011

Question

I have created a plugin and used a reference to another project (DLL) I have created. The problem is when I try to run the plugin, I get a CRM error saying:

Answer 1

Sometimes the Anti-Virus will prevent ASP.NET from accessing file or assembly, I suggest you try to sign the assembly with strong name and add it to GAC: Here you can find more information http://support.microsoft.com/kb/815808