Sorry - I was replying to the original thread.
Just get a remote start switch. This allows you to take power from the positive lead on the starter and send it to the S terminal on the solenoid.
There are many on the market. Here's one...
Amazon.com: Actron CP7853 Remote Starter Switch: Automotive
If you can do this and it fires right up you know that it's an ignition switch circuit problem. The remote start switch allows you to safely bypass the starting circuit.