I had the same card (still have, just haven't put it back in yet) and I had nothing but problems either. The best I can suggest for now is this:
(1) Uninstall all ATI crap. EVERYTHING.
(2) Boot into safe mode. Uninstall all ATI devices in safe mode.
(3) Run driver cleaner in safe mode. Run it with all "ATI" options.
(4) Reboot and first install latest Catalyst's for vid card.
(5) Install each piece of the TV Wonder suite of crap one by one, in whatever logical order you can think of. Reboot after installing each piece of software.
This is the only way I know that should help eliminate software conflicts. Have you ever had an nVidia card installed? I heard of TV Wonder cards not working right with nVidia drivers installed. GL