Remote Issue w/ Harmony 700 and STB Emulator on Neo-X8 Plus Minix Box

I have STB EMulator (MAG250) running on my Minix neo X-8H plus, no issues there. I then setup to use my Harmony remote (model 700) to control TV/PVR functions, Most of the basic functions work in controlling TV/PVR etc, however changing channels using the numeric keyboard does NOT wrok. My basic wireless QWERTY keyboard remote works perfectly in perhaps replicating as what MAG250 remote would have done. however i can't get harmony remote to change TV channels using its own numeric portion of the keyboard. I have tried various options, but perhaps missing some steps. are there any settings in STB emulator (under remote control) that need to be changed. Anyone else experiencing the same issue. Thanks.