tying to program a ford keyless remote

[Michael 1]

Hi i am trying to program my keyless remote for my ford 2002 e-450 van. The numbers on the remote is FCC ID: GOH-3BFM2497, CAN: 1409 102 688. i have one remote that is programmed and one that is not. This keyless system is a ford aftermarket unit installed by a ford dealership.
Someone told me it was a code alarm system or something like that.
Can anyone help.

Thanks
Mike

[draasch]

do you know what brand of unit it is???? does it say ford on the transmitters????