Well, having done mine the other day, you can't just paste the code in the signature posting area. You need to click it to get the Insert page to come up and paste the url in there. So, when in the signature page, click on the little icon for 'image' and that will pop up and paste the Image url in there and you're all set. It's in the bar of icons above the posting area, just like when posting to a page, and it's right next to the smilie icon, with a sun and mountain little pic. Anyway, took me a while to find it myself, lol, at first I couldn't figure out how to do other than clicking on the one I was replacing, which also made the pop up open. Anyway, good luck!