okay i got a HP 1101AX then i add a happaugh wintv pci card and evertime i have yahoo chat with voice

and when this program is not running the on-board sound card " Realtec AC97 will make the sound so low if i use wintv so this is what i did i stop using yahoo all together and it work but this happen 3 time so is ether

happaugh card fault
realtec fault

or is BOTH there fault so i figure what about a sound card will that help and a better tv card and advice ?