Truck won't start, flash or scan..

[V8 HUNTER]

I'm having some problems flashing my truck. It's a 2006 Dodge 2500 auto. I bought it with someone else's csp5 tunes on it but I bought my own v2 to build my own tunes. I flashed a stock 5553 tune and it worked fine and ran then shut off . So I then flashed it again with a tune with the correct Vin and I don't know what happened but it wouldn't take the tune. Now V8 won't won't read the ecu and won't flash it either. Now when you turn the key on the trucks lift pump just pulses and it will crank but not start.
Also the 4th light across on the v2 stays on.
I also plugged my smarty touch in to see if it'll read it and nothing. If you try and tune it with the smarty it says the ecm is not in application mode...
What happened? What's my next step?
Thanks.

[V8 HUNTER]

When the flash stops it comes up with, "Script exited with code $0312: sub function not supported or invalid format ($12)."

[superwagon]

So you flashed it with a downloaded stock tune and then started the truck without verifying correct vin number?

[V8 HUNTER]

So you flashed it with a downloaded stock tune and then started the truck without verifying correct vin number?

It started then shut off because of the skim key. So I changed the Vin on v7.5 and tried to flash again and it didn't work. Now won't read at all. It's like the ecm isn't in the right mode or something.

[superwagon]

If it had the correct VIN before you started it then I'm not sure what to recommend.

[V8 HUNTER]

I need to figure out what $0312 is. For than code it just says contact efi live to I'm going to have to do that.. I'd take it to the dealer to reflash it but it doesn't run

[2007 5.9]

Unplug the csp switch and retry

[superwagon]

Unplug the csp switch and retry

Was he flashing through the csp5 switch? I always unplug and flash directly through obd2.

[2007 5.9]

Was he flashing through the csp5 switch? I always unplug and flash directly through obd2.

Didn't say but 99% of the time your trying to flash through the switch and get a $0312, unplugging it fixes the issue

[superwagon]

Thanks for the info Les!