"Bad Parameters"

[Saffire Persian]

All right, I make banners in Photoshop, and I was making this animated .gif for someone, and when I finished it, I went to upload it, and when I did I got a "bad parameters" message. I then went to a variety of image hosting sites, and none of them would take it, and I got the same error message.

Is there something I could do to fix this?

 

[Saffire Persian]

I can perfectly see the preview, and it isn't even taking files that I have uploaded sucessfully before.

So, I'm guessing that the problem has to do with my computer. I highly doubt its a virus, as it's a Mac, and viruses for them are rare.