Thanks for all the replies guys.
I feel there may be a problem with the card after all, i tried it on a card reader,and it works fine,but will not work on either the 350D or my old camera a 30D.I am going to try it in my friends 350 to see if it works on his.
BTW i got the card from Ebay UK seller “24 Hours” cost was £25 plus £4 P&P.
Thanks again.
Scotty