Adding a gallery ID graphic

How do I add an identifier graphic to the left side of my gallery ID to replace the generic RS icon? My old one seems to have disappeared.

here:

http://www.rubberslug.com/member/gallery/content_manage.asp?Page=Gallery

but it is not anymore
Height: 50 Width: 120
like still written there
it should be now
Height: 50 Width: 50