Try downloading Windows Media Encoder from
HERE, and use it to capture your TV feed.
Also, don't forget to select the correct source. If you are trying to capture live TV from your cable box, you will likely use "S-Video" or "Composite In." If you have an AIW card, and are using the built in tuner, your source will need to be set to "TV Tuner" and NOT Rage Capture.
You will also need to set up audio separately, usually by using a stereo plug from the TV source to the "Line In" of your sound card. This source will also need to be specified in the capture software.
rasta