Well, ive not heard of that before, try installing MSNM 6.1 again, then post back here what happend, if it all works fine then its a bug in MSNM 6.2, if you go to Tools > Options > General, look under alerts, if you find that any are unticked, tick them.
If you still have problems, download the same version from another web-site, mayb it was the download from the site that wasn't complete, did you download it from the official site ?