How to put a Picture in Signature block

Hi everyone, I'm rather new to this site; and really enjoy everyone's pictures and stories.

I need some help! Is imagestation the only accepted picture link?? I've got lots of pics loaded on Snapfish, but it doesn't seem that I can link to a picture there - is that correct? Or have I done this wrong?? Anybody smart about all this stuff, help me out!!

Here's pic of my 3 critters that I want to put for my signature
http://images.snapfish.com/339785%3A...C697%3A4ot1lsi

but the code is the only thing that's showing up!