I just downloaded MSN messenger for Mac. when i go to sign in, it says there is a newer version of messenger available and i must download the new version before i can sign in. it asks me if i want to do this. i click yes. it starts downloading and a progress bar appears. when it finishes, the program closes. i re-open messenger and try to sign in again but it says the same thing. I've done this 4 times now! but the "new version" is not appearing in my downloads folder or anything. can anyone help? i'm not real experienced with mac.