I've just moved from a Dell Vista Media Center to a HP Win 7 Media Center PC. In doing so, the HP box doesn't seem to recognize when commands are sent from the Pronto. The HP PC is an e9280t with an IR target on the front. I'm wondering if the Pronto sends commands at the wong rate? I have an IR emitter connected to a port on the RFX 9600 which has not changed. In the Dell setup, I had an external USB IR Recieiver.

Any suggestions on what to try next? Both TV cards are Hauppauge.