HVR 1800 Some clear QAM channels not working (1 Viewer)

[73challenger]

TV-Server Version: 1.0 RC3
MediaPortal Version: 1.0 RC3
MediaPortal Skin: blueskin wide
Windows Version: XP SP3
CPU Type: Athlon 64 x2 dual
HDD: 250 gb
Memory: 2gb
Motherboard: ASUS M3N78-EMH HDMI
Video Card: Gefore 8200 onboard
Video Card Driver: Drivers came with motherboard
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: hauppauge HVR-1800 (model 78xx)
1. TV Card Type: ATSC/clear QAM
2. TV Card: hauppauge PVR-500
2. TV Card Type: Newest one
2. TV Card Driver: NTSC
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
h.264 Video Codec:
Satelite/CableTV Provider: Comcast
HTPC Case:
Cooling:
Power Supply:
Remote: One that came with the hvr 1800
TV: Panasonic 42px600u
TV - HTPC Connection: HDMI cable
Hello, I am having a few problems with my clear QAM channels. Some of my channels work great but when I try to preview some i get channelisencrypted(which i know is normal). But, sometimes when I try to preview the channels i get "UnableToStartGraph". What could be the problem? I'm pretty sure some of my local channels that I know I should get are doing this. It is kind of hard to tell what channels are doing this because I have to watch the channel to figure out what it is so I can rename it to the correct name. Thanks in advance!

 

[73challenger]

Well I lied. I was only running RC1 and I did not have WM11 installed. I upgraded to RC3 and installed WM11 but it did not fix my problem.

 

[73challenger]

Does anybody have any idea whats wrong? Its weird how it works perfect on some channels but not on others.