i710 Wallpaper Issue, Please Help

I have an i730. I'm trying to put some wallpaper on my friend's i710 but for some reason they all show up as a white screen. They work on my phone, but won't work on his? Any ideas?

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The size of the .gif is very important and tricky. I put one the was 130x130 and it did the same thing, 125x125 did the same. but 123x123 fixed it. They were all the same pic I just kept shrinking it.

Thanks for the help man. I'll try that next time I can get a hold of my buddy's phone. I never even thought of it being a size issue. On my i730 it the size is wrong it just goes off the screen. Thanks again.