cant adjust parameters

[gdawg]

Just got my trinity did all the updates on computer. it lets me install a performance tune successfully, but afterwards or even if i try doing a modified tune where i adjust parameters it comes up pcm error unable to reflash. All i tried to adjust was tire size and throttle boost. Ive returned to stock and tried a few times but same issue no matter what cant adjust parameters. any idea thanks

[mikel]

try skipping tire size, see if it works then.

When it says error unlock for reflash, whats the rest of the message?