Have you hooked up a meter to your clutch switch and ensured it is working properly?
Completely disconnect it from the clip on
Put a meter across it
Ensure in one position the switch is open when depressed it is closed
If so....
Manually hold the switch plunger in (simulating the clutch being pulled in and held) continuing to hold it until the launch delay timer is met (2000msec default = 2 seconds adjust if you have changed it)
Then grab throttle and pin it and hold it to see if it reaches and hold launch RPM
If doing it manually this way and it won't go, then you either have one of two issues;
--Aftermarket or OEM levers that are out of adjustment and not pressing on the clutch switch fully
--Clutch switch is shot and not opening/closing with the plunger on the switch
