Avitar and profile pics??

Ok, I know how to post pics in threads from photobucket and all but how do I put a pic on my avitar and profile pic?
It always tell me it's to big and I have trimmed/cropped the hell out of the pic

Ok, I know how to post pics in threads from photobucket and all but how do I put a pic on my avitar and profile pic?
It always tell me it's to big and I have trimmed/cropped the hell out of the pic
GOT TO BE 50X50.HAVE TO CHOP UNTIL YOU CAN'T SEE IT,TDBROWN