MV-1 Master to DAW (Reaper)

[jacobh24]

I'm struggling to get the MV-1 to start/stop playback with my DAW (Reaper) through USB, any help would be appreciated.

Some System/MIDI settings:
Sync Src: INT
Sync Out: ON
SyncOut USB: ON
RX StartStop: ON
RX Start USB: ON
Auto Ch: OFF
Soft Thru: OFF
USB Thru: OFF
Edit Note: ON
USB Drv: VENDOR

Some Track Settings:
TxMIDI Out: ON
TxUSB Out: ON
Tx Note: ON
Tx CC: ON
Tx PC: ON

In Reaper, 'External Timecode Synchronization' is enabled and 'Use Input' is set to MTC:2-MV-1. I'm able to record separate MIDI tracks from the MV-1, but Reaper's playback doesn't respond. What am I missing? Thanks...