AB60N audio problems

I just completed the assembly of my new system. The audio is very
weak or near non-existent from the rear jack on the board. When I
plug in to the front jack on the case it works fine. Also before the
plug is fully inseted in the front jack the speakers on the rear jack
work just fine, then go off when the plug is fully seated in the front
jack. I have reveiwed the cable connection but can not find an error.
I have also gone out to Realtek to update the AC'97 drivers. Any help
would be appreciated.

Celeron 2.2
512 mb Patriot 3200 mem
Sony CRX230A-U CDRW
20g HDD
Windows XP
MGS SOHO H2 case 400w power

Regards
MLD:)