2008 Ford F150 key fob programming not working?

I bought 2 new key fobs for the f150 i got the 1st key to work but when i tried programming the second it didn't work and the other one stopped working and will not let me program it. Any advice?

You have to program all of your key fobs together at the same time. Try it again with all fobs.

Have the dealer program them for you.