sting pro dx-710 alram

it's a 2 way fm lcd w/ motor start alarm. I belive i have all my connections correct but i need to hook up the parking brake wire. The wire in the diagram indicates that it needs to hook up to the negitive wire but there is only a positive at the parking brake. When i ground this wire it causes the ingnition to stay in the on position in the off position but it cuts off the relay after a few seconds. Also when i program the engine start self check mode it will work for a few times but the will stop working. I cant figure it out. I dont have power locks or windows and the wires are not connected. I just want to use the alarm and engine start. Will the none connected wires affect the brain.

Has anyone heard of stingpro and if so what is the web site or phone number? thanks   

Hey sweetsound I just bought a stingpro dx-710 lets hook up and compare some problems and see if we can help each other out. My email is Speedylongchamp@aol.com