Welcome aboard plcautoparts :)
Just replace the DME, then go to coding/programming...
Then select DME ISN Manager, then read DME ISN (should be 4 digits), save it.
Go back and enter CAS ISN, load the file you saved it from DME, then click on next.
You will be asked to sync DME-CAS, accept it.
Start the engine, it should start afterward.
cheers