As was posted in the link I posted above, the correct code to use is the BB code. Here is one of the comments I made in that link above:
Yes, the HTML code is turned off in the Signature, but you can use the BB code - the code you used above is not the complete code. I think you copied it incorrectly. The code I just tested started with "[url=http://www.TickerFactory.com/][img]"
