“You love him too, don't you?”

Help! Is there any computer heads out there that can help me with my icon problem? Crazy4ew made me two beautiful ewan icons. I saved them to my computer like I always do and then tried to put them in my lj icon place. It kept saying that it was the wrong file or change it to a png, gif or jpg file. Well for an computer illiterate like my self that`s like speaking a foreign language! If you can help me I sure would appreciate it. They are so lovely I want to use them so badly! Thanks, nancy