Answer:
Go to: http://www.irfanview.com and download a copy of the software program IrfanView.

It's FREE.

Run the program, resize your image and save it in the formats of .gif or .jpg and make sure the filename is simple and short, without space or strange characters.

Then, return to Ahmoi and upload the photo you desire.

To learn more about how to resizing your photo file, read IrfanView FAQ for more details.