Mike, look at NPL,0,5,20 - you will see if you have zone page group dial numbers. If not, you can add these numbers here:
NPL,0,2 and enter required range of zone page group numbers, of course numbers you enter have not to be used anywhere in Numbering Plan. Then enter index (beginning from 0).
After finishing job go to VPZ and it will be OK.
If you can't enter dial numbers at NPL section, check parameter ZONE PAGE at SIZ - but only in DISPLAY mode, not UPDATE!!