7210 and camera

Hi,

I recently received a 7210 as a free ugrade, and a freind has given me
the camera/headset attachment. When I take a picture the light flashes
for a while, and my phone receives a file. However when I try to open it
it says 'unable to open file'. I can look at the size of the file and
other details but not the picture.

Any clues as to what is going on?

Arky