How are you saving it.....32, or 24 or 16 bit. I believe when I saved mine I had to do it in 24 bit. Seems some stuff you can save in 32 bit and some you can't. Only thing I can think of is in 32bit the file size is too big. And if I remember right then when I saved in 32bit the picture wouldn't show either and this would happen in 16bit too.
I'd try saving each way and I bet that fixes your problem
Doh I posted this as new thread instead of reply...hehe