robzilla - 12:36 am on Nov 23, 2013 (gmt 0)
Well, there you go. That'll be interpreted as an SSI call. I'm guessing you copy pasted that, and whoever wrote it probably didn't think about SSI either. It's likely to be meant as an instruction to you, the user of the code snippet: "activate the banner here". So you can remove that comment and, err, activate the banner, I guess.
I do hope you have it working by now :-)