MythTV problems with Hauppauge WinTV-HVR-1800

[meige]

Has anyone got the Hauppauge WinTV-HVR-1800 to work in MythTV?  I have put a 2-way splitter of the cable coaxial from the wall that goes to my set-top box and the other line goes to the TV IN of the Hauppauge WinTV-HVR-1800 card.  My MythTV detects in the backend of the setup that it is the Hauppauge WinTV-HVR-1800. 

I did an 'apt-get install mercurial' and got the relevant update for the DVB-type card. 

I can't get a signal or lock on any channels using of Time Warner cable (in Cincinnati, OH).  I don't have HD programming, am I supposed to use QAM-256?  Can anyone give any insight on getting this card to work?  I just want to be able to record and archive programs.  Please help!

Brandon