No pictures. I have a new Pentax Optio S10 with a Transcend 2GB sd card, which was correctly

Question

I have a new Pentax Optio S10 with a Transcend 2GB sd card, which was correctly installed and formatted. I took several pictures which played back fine on the LCD screen. When I attempted to view them on my pc I get the message: there are no images on this device to aquire. The software recognises my camera as an s10, but whatever software I use I get the same messege. Could the sd card be faulty?