MSN Messenger live stopped

Hello,
the messenger that i have was working very good , and when i was closing more than program i did close msn by mistake and i tried to opened it again to sign in again but it didn't open ,so i tried to delete the msn's folder from its resource from my computer(c)..to install it again from the very beginning then i was shocked ,suddenly box appears on my screen and it said the messenger live has stopped working .. so plz tell me guys what i can do ?