Overbridge VST and MIDI CC

Should I be able to send MIDI CC from my Novation 49SL MKIII to the Overbridge VST running in Ableton (connected to an A4)?

I’ve got four MIDI channels receiving MIDI in from the 49SL and sending MIDI out to the Overbridge VST on another channel. The plugin is receiving notes and responding to pitch and mod wheel changes, but not responding to rotary and slider changes sending other CCs. e.g. if i turn the CC23 encoder, i’d expect the cutoff on that track in the plugin / on the A4 to change, but… nothing.

Should it be possible?