Thanks cookie for your help, i tried your solution by reinstalling the whole msn. I don't know what happen this time, it seems like my registry is corrupted. Now i got a different error this time when i tried to login. It gives me error 80040154.
I tried to get help from microsoft support FAQ and they told me to reregister Msxml3.dll but it doesn't seem to help. Frankly speaking, i dont like their solution there cos i find them rather useless.
