external sound card prob

hy everybody! I really need some help!
this is my setup: Toshiba satellite [email protected],1 Gb ram,ati radeon 9700 series,Xvid,and an external sound card:Trust SC-5500P 5.1 External surround Soundcard, http://www.dabs.com/ProductView.aspx?Quicklinx=3SQ7&v=4(connects through usb and no external electrical alimentation0.i have two options in installing this sh#$%t:with the drivers and without the drivers.the problem is that with the drivers installed i have 5.1 surround sound with a creative 5.1 system but after exactly 37 minutes all I can hear is a gargling sound and the picture is acting like hell: it goes forward like being pressed the ffwd button on an old vhs player(if you remember);now if i uninstall these drivers i only have sound in the front speakers the center and the subwoofer. I have set the speakers out to 5.1 in the win control panel. I use AC3 0.70b and this happens with all the players i’ve tried: vlc,bsplayer, mpc.I really don’t know what to do next.i use a tv hooked on the laptop through s-video tv-out in dual video mode, and if I grab the image to put it on the laptop screen the gargling sound disappears and the image is again correctly played.can somebody please,please give me a clue?

 

This will sound stupid, but have you unistalled the previous drivers, for the sound on the laptop.

 

yes i did actually i installed the new drivers on a clean install