php error with signature

[Stupid Shizno]

im trying to change the sig, the paramters are the same its just the text inside the jpg im changing. i try to input


http://img184.imageshack.us/img184/9222/1simmonssigyc1.jpg

and when previewing the signature i get this error
Fatal error: Using $this when not in object context in /home/guildwarsguru.com/public_html/forum/includes/class_upload.php on line 401