I had to buy stock 1999 C5 corvette tune off resportoiry because i lost mine so i can upgrade from 2 bar to 3 bar. So i did, went to flash ecu but it will not let me change vins. The stock tune that i had to buy has a differnet vin then mine. When i try to write entrie to 3bar the car freaks out and just makes a ticking sound intell i reflash to my origal 2bar os. Do i have to buy more credits. If i bought stock file do i have to buy more credits to make it 3 bar. I have 2 bar now but want to upgrade to 3bar. I attached info on my suite info. Thanks