please help me post a picture of my dog!

Hi, i just joined and someone told me i would be able to go to photobucket to help get a pic on. I did this---joined the service---and then uploaded a picture of my dog to it and got it in the right size requested and the file name ends in .jpg, but for some reason when i try to copy it and paste the link in my profile in the appropriate place, the error at the top of the page says the file must be a .jpg (and a few other options). It IS a .jpg file and I am copying the link directly from the photobucket site and it SHOULD work! Anyone know what is going wrong? I can send you a link to my photobucket site if that would help.