I am copying my finds I posted elsewhere. I think I know what is going on. You need to download the latest exchange servicepack and replace the cdoex.dll in the C:\Program Files\Common Files\Microsoft Shared\CDO directory. I had version 6.0.4641.0 and it would not work and gave me the same message that it gave you. I Downloaded the service pack 3 for exchange and extracted it. It will not let you install it unless you have Exchange Server 2000 so you have to grab the file manually. Once you are at that point, the dll is going to be in use so you will have to shut down to safe mode. Replace the file and reboot. The new version of the file should be 6.0.6249.1 then it should work or at least mine did after I did that. I hope that helps someone out there who is having this problem.