nana-chan00 = That is the error when your photo is too large. Depending on how you saved it, it might be actually bigger in reality than your OS tells you due to rounding, and it looks like you are very close. Usually, gallery photos only need to be around 200 kb at most. (So maybe your resolution is more than 72 dpi? Anything higher than that is for printing and can't be seen on screen anyway.) If you can't get it to work, attach it to a reply so we can look at the exact file and double-check.
Alish = Your profile picture is the same as your forum avatar for me. (In order to clear the cache of the old pic on your computer, hold down the shift key as you press reload.)