RPi PVR Guide Button on Remote doesn't work

Hi, I have OSMC on a RPi 2 and and am using NextPVR to bring in TV. I am trying to control OSMC with a Windows Media Center remote. All of the buttons work except for the Guide button. Instead of the EPG appearing when I press the Guide button, I get something that pops up over the TV signal that shows PVR stream information. Is there a way to get the EPG to appear by using a Windows Media Center remote? I can reprogram the buttons (the remote is actually a Harmony remote that I’ve programmed).