How do I program my keyless entry on by Ford expedition?

I have done the steps 100 times in the manual, and I can not get my key less entry to work on my 2006 ford expedition. The factory code won't work either, I don't know what to do.How do I program my keyless entry on by Ford expedition?Visit www.progamyourremote.com. Be sure to follow instructions carefully. Always a success.