Web site Deployment Error

I'm getting the following error on website deployment.

Could not load file or assembly 'eWorld.UI, Version=2.0.6.2393, Culture=neutral, PublicKeyToken=24d65337282035f2' or one of its dependencies

I have added the eWorld.UI.开发者_JAVA百科dll to the bin folder also. So what could be the reason for the error?

EDIT

It looks like not only the above assembly application does not referring to any assembly in my bin folder.

Does the eWorld.UI.dll have some other dependency that is missing on the production server? This happens from time to time and it usually is resolved by adding the missing dll to the bin folder, just as you have done, and then restart the Application Pool (if using IIS).