Using RehearseScore... Tech question

Hello - I've used Rehearse Score for many years and have never had a problem with this. We are currently doing '9 to 5' and there are measures that are optional (Labeled 65A, 65B, 65C, etc.). I am trying to cut them so they never play, as the orchestra will be making the cuts. Within one of them, there is a vamp written in. I am not able to put the cut in, and I suspect that it is because there is a vamp there. I need help cutting it. I tried, and am able to make cuts in other places within the score, just not there. If you want specifics, It's the song 9 to 5, and I'm trying to cut measures 65A - 65D with the vamp being in mms. 65C. Thanks