New MS Vista on computer with Dell Axim X50 PDA PPC2003 using latest Windows Mobile 32 bit as Sync for computer. PDA will not show SD card at all. The regular built in storage is fine and works. The card is a SANDisk 1

gig new and works fine in my laptop.
My version of Active Sync on my PDA is 4.7. Since I am using MS Vista, Active sync is not upgradable.
Any suggestions?