a7n8x-ex error beeps
 

i installed this motheboard in a case,
connected everythin in a way i think it should work( and according the manual )
but when i try to boot it up, the system gives me error beeps, but i can't seem to find the meaning of the beeps

motheboard:a7n8x-ex
proc: amd mp1900+
512 mb ram

the beeps: long short short short

can anyone explain those beeps to me,
google wasn't that helpful neither the manual.

I think they are Award bios files, look over....here:

http://www.bioscentral.com/beepcodes/awardbeep.htm