Richard,
Thanks again, I have installed the apple files without success. I have also re-installed all the Catalyst sw along with the drivers for the card, again without succes.
I have noticed that there appear to be two versions of the card driver, 2.0 and 2-1.0, I have installed the latest.
Looks like the answer ies with AS, possibly a faulty card???
Thanks and have a good weekend.
Ian