display changes when going into timeshift mode

[Dal]

Hi,

Can anyone help with a problem I have of losing some of the display when I switch into timeshift mode.

I am using a Sapphire Theatrix 550 Pro TV card (ATI Theatre 500) and a Gigabyte 6600 GT GFX card. 1 gig Ram. Athlon 3000+ (939) processor. 300gb Maxtor HD.

I am capturing video from my Telewest stb through a composite connection to my the Theatrix card. The picture is perfect when I am just viewing TV but as soon as I hit pause and GBPVR switches into Timeshift mode and I loose the lower section of the screen. I discovered this when I noticed some of the Telewest on Screen display was missing. Also I noticed the picture degrades and I start getting artifacts on the very lower part of the screen.

I have am using the nVidia decoder

Any help would be much appreciated.

Thanks

Dal