starter disable interupt problem

I am having trouble making my starter interupt work, I have an impulse 777..anyway I use the output from the alarm when its armed it gives a ground, so that I connect to 85 then I connect 86 to the ignition and 87a to the key side and 30 to the starter side, still for some reason the car will start and same when I tried flipping 87a and 30..which should do nothing anyway, then i figured I just dont have a good enough ground, so I ran another relay to make a better ground, still I had the same problem..any suggestions?

SPDT Relay

1 or 2 amp Diode across PIN 86 & PIN 85 with stripe facing PIN 86

Cut Starter wire in half:

PIN 86 & 30  = Ignition switch half of cut wire

PIN 87a  = Starter side of cut wirePIN 85 = Negative Output from Alarm while Armed

MO

Don't Learn from Others Mistakes

You Might Be the One That Knows.

hey just want to shout out to mo12v thanks man..wired it up just like you said and man..wish i asked you hours ago..haha i would have saved myself alot of time..well im a memorize that wiring setup..thanks again and thanks you all you on the page...what would we do without www.the12volt.com? ...probably never solve many problems..or take hours and hours doing so...