Using Set top cable box and Dual TV tuner card

I have a dual TV tuner card and was able to record two shows simultaneously
when I had my cable connected directly into the TV tuner card. I want to
record the premium channels and got a set top cable box from the cable
company and ran the cable line into the box and from the box to my Dual TV
tuner card. The problem is that Media Center is recognizing that I have dual
TV tuners but I believe that it is assuming that I have 2 cards because
during setup it was asking me to identify the set top box for each tuner. I
got all that set up and the system allows me to change the channels but I
can't figure out how to record the two channels at the same time because
Media Center tunes in to one channel and starts the record process and then
changes the channel to record the other so both tuners are recording the same
channel. I hope this makes sense and that there is some kind of work around
to this or that I made a small mistake that I can correct when running setup.
Thanks again in advance for your help/advice.

Renny

 

You need two STBs and you feed them in to two S-video and audio connections.
You can not feed them into the two NTSC tuners since they get their signals
from an internal splitter fed from the one RF antenna connection

 

You need to get another Set Top Box & connect it to the other input on your dual
tuner card.

 

As JW and Nigel said, you need two STB's. This article by MVP Barb Bowman walks you though the setup.

http://www.microsoft.com/windowsxp/using/mce/expert/bowman_dualtuners.mspx