Cummins ISX Injector Trim Codes

[MPDiagnostics]

Hey guys
We have a Cummins ISX Cm2350 that we replaced the injectors on. I'm having a heck of a time programming the trim codes. I've also had little success in the past doing them as well.

I type the 9 Alphanumeric characters in that are on top of the solenoid and insite each time says it failed to program them. Then I try the next string and then the next string and still the same. Is there something else I am missing?

Need some advice please
Thanks