Hopefully these instructions can help you...It took me a while to figure it out too....
If you are using Lilypie, you need the code that says:
"PseudoHTML, UBBCode™ or BBCode
Used on many message boards that don't allow HTML."
It gives you a big long code like this
[ url=http:// lilypie.com][color=red] [img]http:// bd. lilypie.com/WdGkp11/.png [/ img][/color][/url]
You need to put into the Signature box of your forum details the [ i m g] everything in the middle &[/ i m g ]
ONLY USE THE PARTS I HAVE IN RED FOR YOUR SIGNATURE
make sure you include the brackets and there are no spaces in your code..
If it is half size you may need to go back to Lilypie and create a new ticker, with the full sized option...
Hope that helps