PMDG 737-NG Can't chg the top row of controls on EFIS ...

I can't change the decision height or adjust any of the controls in the top row of the EFIS panel.I have the upgraded version of 737-NG that has the 800/900's added. I installed the software last week.I didn't see any entries in the forum that seem to relate to this.I'm new to this product, but I have been able to follow the check list and fly the aircraft two or three times. And all of the other knobs and switches on the main panel seem to work. I havent' gotten into the FMC at all and I'm thinking that I wouldn't have to set up my flight in the FMC in order to set the decision height on the EFIS panel! Or would I? I will be learning to use the FMC, but presently I'm focused on learning to use the features of the autopilot.Does anyone have any ideas on this?Thanks,Ted