Problems setting up LG surround sound with RC73 remote - DirecTV

I have a LG surround sound system (model: LHB336)
Genie Box (HR44-700)
Remote (RC73)

I have followed directions setting it up 3 different times, without complete success.
The RC73 remote will turn it off, and turn the volume up and down...but it won't turn it back on.

Please help