Try formatting your card. If could be the difference between FAT32 or NTFS. Check the card's properties of it thru my computer on ur PC, and format it again. I had a 1gb card before I got the 4gb card for my w910i and the 1gb gave me the same grief. This is how I solved it, Use full format- don't quick format it. Don't worry though. The w910i does accept 4gb cards.
Failing that, find the receipt, and take it back to where you bought it for a replacement.
Hope this helps!




