You probably don't have the right version of the DLL. On my system I have 7 different versions of it:
According to process explorer, worldserver.exe (for the 3.3.5a branch) loads the one in bold.
You probably need to install the Service Pack 1 redist and then the security updates for SP1 redist to get it.
ATL Security Update
MFC Security Update
Note: Your best bet is to simply run Microsoft Update to make sure you get all the security updates