DRL Addition for 2006 Lincoln

I am adding daytime running lights to my 2006 Town Car. I have them hooked up and wired in according to the directions from the manufacturer. The problem is that I have auto on headlights and the DRL need to be hooked up with the parking light wire. When I do that, the headlights stay on but the DRL's will not. The only time they come on is when I open and close the door or turn the key on then only for a few seconds before they go off again. Any suggestions:screwy: