Cubase has stopped working

""Cubase has stopped working

A problem caused the program to stop working correctly.
Windows will close the program and notify you if a solution is available. “”"

hello everybody. i have big problem! i have Cubase 5 and everything was good till i got this msg. im turning on the program and after 13 seconds i see this msg and program is closed. i just finished my ptoject and i cant to do nothing more because i dont know how to fix it. :unamused: :question: :neutral_face: :nerd:
please help:/