your image hosting site says that if you have a free account, it's deleted if you go over 1 meg or if you don't access your account at least once a month.
your avatar
as well as
what i assume would be the index of your account show the same image, so i think it's been deleted.
i would just e-mail the people there:
iownjoo.com wrote:All questions are answered within 24 houres if you email them to
Webmaster@iownjoo.com. You can also try asking on our forums, which you can get to by clicking community up top.
i'll host it for you on my glpics account, or if you want access to it yourself:
photobucket.com
-sk