Need your help urgently, can't log into MS ( Never had this issue).

Good evening, I could log into MS before the server check was conducted, and everything was fine. I tried logging into MS after the SC and failed ( tried non-stop during the day). When I hit the play button on the site it just sends me the error message: MapleStory has stopped working> Check online for a solution and close the program or Close the program. I will be very thankful if anybody helps me. Thanks, Greg.