Try updating the driver from the manufacturer's website (of the TV tuner). If that doesn't work, keep that driver, but go to device manager and see if it is listed there. If so and chances are there is probably a little exclamation point or something besides it, try and uninstall it and reboot. From there the device may reinstall with the proper drivers.
thanks bro for the replay,,,,but i did everything,
updated latest drivver for tuner,evrythng is ok,like device manager and all....last i did a re installation .then i find the reason,shuttle centre is not compatible wid win7,even i tried run it in win7's compatibilty mode from,vista to xp!!!!!
last i configure windows media player,now it plays evry channel in cable,,,even with more user frndly than shuttle centre!!!
windows media centre rocksssss!!!