hi all,need help with a little problem.

Basically when i connect the camcorder upto the computer i get picture but no sound

There is sound coming out of the camcorder speaker but thats it.

when i rig it up to the tv i get sound in all its glory

record on to my dvd recorder through tv and again every thing ok

i have loaded the usb driver disc on the computer 3 time now and still nothing

camcorder in question is about 5 yars old,model sony DCR-TRV22E

please can somebody tell me what i'm doing wrong

Ary