Home Theater System Surround Problem

Ok I have had this sony home theater system for a little over a year now. Except when I play movies with the dvd player my surround speakers, left and right, give out little to no sound. But when I put it on multi stereo, plays 2 ch on all speakers, they sound fine. It also does this on the tv...

i've gone into the amp menu and changed the surround speakers to +10db and the center and front speakers to -10db and then turn it all the way up and it still sounds like nothing is coming out.

I have plugged the surround speakers into the front ports on the system and they sound fine.... I have found that the actually plugs on the sytem are busted ( they have been like that ). I never realized that, so now out of my warranty.

I have gone to customer support and they pointed me to the phone after looking up what the problem is for 20 minutes, I called and then they pointed me to go pay $100 to get it fixed, I was just wondering if someone had this same problem and how they fixed it....

On our system downstairs it sounds perfect on but mine its messed up and I don't know what to do.