I contacted the seller who again assured me they have sold loads of these to people with XDAII's & have no problems.
I just wondered if there was anyone else who has bought one & either had the same problems or got it to work.
The other annoying thing is that while i was trying to fit it & eventually gave up, when I connected the battery & back on it seemed to have done a hard boot, so i had to re-install all my software again!!!!
Should this have happened & how can i stop it happening again if I try to fit a replacement.
i've included the descr. & item number of the ebay item in case you want to look.
6260/6620/P910i/X500/S700i/xda II DUAL SIM CARD
Item number: 6365722284