Autpage System Wont Start

I just bought my 2006 2500 last week. It came with a keyfob but all it did was flash the lights and make the siren go off. Since my truck is a WT so no power anything I knew this had to do more. Took the panel under the dash off and found the C3-RS730 module installed. Now here is where I need help, first they had the orange plug for the 2 stage shock sensor zone 4 ran under the truck to the tailgate and there the wires were cut?? Second when I hit the remote start button the lights turn on, the cel light comes on, I hear the fuel pump kick on and relays click and nothing, no cranking or anything. Any ideas? I've checked all the wiring and it seems to have good connections everywhere