i did not check. but maybe your card produces a mpeg stream in some way?
i once had a digital pvr card after owning an analog bt878 card and it took me some time to get it running. in the end it was about the correct modules loading and setting up vlc to pick up the mpeg stream from the correct device.
using tvtime was not possible anymore. that was quite a setback with this change from analog to digital, because i liked tvtime a lot.
good luck.
regards,
Martin