Can not restore stock tune

[Syccmayde]

I have a 98 mustang gt . I have a duablo sport predator tuner.I need to restore the stock tune but it wont let me. The only way i can is if i can force the restore. I need a dealer code so it says. My predator code is 56f9 36eb cbe9 dae3 ca2f. Can i get an unlock code? Or do i need to get my pcm reflashed?

[mikel]

you would need to call for a force code with the tool in the car, as there must be a reason it will not let you install.

Thanks