Dual Tuner recording working after upgrade from XP to Vista

I upgraded my HP media center vista ready machine, and everything worked
beautiufully. As I ran through the TV tuner wizard it recognized that my dual
tuner card was detecting two analog cable signals correclty. It allows me to
schedule two shows at once and does not report conflicts. Only trouble is,
only one show ever records. I tried adding another show while one was
recording, and it simply stopped recording the one that was recording. No
errors, no conflict detections. This was working just fine on XP Media Center.