1998 Pontiac Firebird Starting problems

I just got my 98 Pontiac Firebird, and it runs great. Except, sometimes it wont start. It usually starts if its been sittin for about an hour+ but if you start it and turn it off, then start it again, it doesnt. On the times it doesnt start; the radio will turn on, the dash lights come on, and the security system will beep, the engine just wont turn over. It makes no noises at all.