How to run an FTP server from home machine.

I am having a problem running an FTP server from my home machine. I am using Serv-U. This has worked before. The problem lies now that I am using a new wireless internet service that gives me a 10.x.x.x for an IP. How do I set this up to work. How do I find my real IP address and such?

Help!!!

Try this page to get your real WAN IP address.

Thanks, I will see if I can make that work.