962 VistaSP1 Communication Not Available

I suspect this may have been resolved, but it's difficult to find an aswer the works ....

I have an AIO 962, which is connected via USB to a Dimension running XP Home SP3.  This prints fine as do my other XP machines on the network.

Printing to the 962 from an Inspiron 1525 running Vista Home Premium used to work but now, since the update to Vista SP1, doesn't!!  The printer driver appears to setup correctly as \\VistaMachine\Dimension962, but when trying to print a Test Page it gives "Communication Not Available".

I've tried everything, including trying a system restore - but I can't get back far enough before the SP1 update - deleting all of the old 962 drivers using the CleanUp utility, reinstalling the driver from the Dell website .....

Do I throw away the 962?

HELP!!!