Thanks everyone. I have tried to enter a dispute online but it gives me an error message telling me to call a number. When I call that number it asks for the report number. When I ordered the report from myfico, it replaced my free report online and made the original report disappear (that one had different, more accurate information on it). Luckily, I had printed out the first report (forgot I had) and have located it.
The report number IS on that one
So now I can call Experian and enter my number and hopefully talk to someone and find out why I can't dispute online. It's for an address dispute.