Tv card does not work with Win98

I use TvPhone98 card from Avermedia. It was working good with Win2000. I changed the op system to Win98 SE, then I experince problems with tv card. System crashes when I operate the tv card. It functions good after I restart and update the drivers. But it causes system to crash again after I restart and operate tv card. Every time I have to update the drivers.
I am using 32 Mbyte GeForce graphic card.
The device manager shows no hardware conflicts.

Thanks for your help.