Well, what do you need to start a car? You have the ignition, clutch switch, starter, starter solenoid, battery, fuel, spark, air, grounds, what else? Just out of curiosity, if you have jumper cables hook one side of them to the engine and the other side to the body and see if that helps. I know you said you cleaned your grounds, but just in case and it is only a 5 minute deal. Are you getting spark? Are you getting fuel? How's the charge on your battery? All of those things are relatively easy to check. Did you remove every element of your push button starter rig? Did the starting issue begin right when you put that in? How about if you jiggle your keys in the ignition, does that help?