UPATE- I`ve solved the problem,it was ZoneAlarm blocking MSN messenger,I had ZoneAlarm disabled from my startup programs menu but it was still blocking MSN Messenger so all I had to do was activate ZoneAlarm & tell it to allow MSN messenger access,(I think when I upgraded lastnight MSN messenger caused the problem for ZoneAlarm).
So if anyone else has this problem you know what to do.
🙂