How do I get my URL jpeg appear in my signature?!

[Okinawa Drifter]

Hey guys,
I have my URL jpeg all set up, but it shows on the site, that the [img] tags are turned off? How can I get this to show?

[img]http://server6.uploadit.org/files/grinchvader-drift.jpg[/img]

[Okinawa Drifter]

How can I get an image in my SIGNATURE?!