thanks for the responses guys.
actually, I have gone a new direction now...
I found a new flasher, the same one that I had before (Radioshack Fone Flasher 2), but it isn't working either, just like the old one. So the old one might still be good. I don't know why they stopped working though.
I thought you just plug it in and go.

Is there some programming needed on the station to make a flasher plugged into the ADP port work?
I have looked through all of the programming manual and have found nothing on it.

I have tested a replacement phone for this station and other stations. The flashers don't work.
Ideas?