[Graham M]

Originally Posted by MikeyB

Exactly, your TV card is trying to decypher a TV signal at the frequency you tell it, it has no idea what an FM radio signal looks like. Your card is designed to read PAL (and possibly NTSC) signals.
It needs a different tuner to decypher a radio signal, and unless it says on the box, I see no way of you picking up FM radio with it.
Software alone cannot do this.

My Mums TV has a radio, it's a button on the remote, and switches to Radio mode, it even has a separate aerial socket on the back for the radio, which indicates it's going to a different tuner.

We have a phillips TV like that here.