Please remember that MSN Messenger 7 is still in beta stage, and that the final release is still months away - most likely not before February 2005. The use of any beta software is on your own risk, and you shouldn't be surprised if other programs like this one will not function at all, or not function properly
If you are not an official beta tester, please do not complain about problems you might have: then just don't use the (unreleased) software. If you are an official beta tester, I am almost sure there are (official) ways to mention and discuss bugs with the unreleased beta version, instead of posting on forums like these