alarm problems

my alarm is an Audiovox APS997 i got it 2 years ago and 2 weeks ago the remote start stoped working and today the keyless entry stoped working on both doors but the alarm still works what should I do???

if i just replace the main part (the little computer box thing) of the alarm will it work????

 

I'm confused - the remote stopped working 2 weeks ago, then wouldn't keyless entry have stopped working then as well? Have you tried new batteries?

 

yea i tried new batteries. the alarm still works.