Profile picture won't stay put...

For some reason I keep losing my profile picture. I follow the instructions, and it will appear, then I go back and delete the message I inserted the picture; and all is fine, till later and I go back and I'm gone again. So, this time, I'm leaving the picture in a message. Hopefully, I can start blogging more and it will roll off eventually. So, if this looks lame, then I'm very sorry.