Craigslist Problem

I recently installed CFP
Win XP Home + SP2 + updates, IE 6
NAV 2007
Comcast cable ISP

We want to sell a car on Using a win xp user acct (not admin) and IE6 we connect to craigslist and type in our ad. Here’s the part that does not work: when we attach a picture of the car, craigslist appears to accept it. But when we check the ad later the picture is not there.

Prior to installing CFP we have used craigslist and attached photos. This must be some sort of rules problem that we don’t understand yet. What should we check/do?