Send CC from controller to max4live device

When the control surface script is not active, I can turn a knob on my midi controller (i.e. say knob 7 which corresponds to CC 22) and this enters the max4live device on my selected track, and this max4live converts to CC values to Program Change message (see cc_device_view.png , also have a midi monitor showing the incoming CC values).
However, when my control surface script is active the CC values don’t seem to be able to enter the devices on the highlighted track, i.e. the midi monitor doesn’t register any CC values present (see cc_device_view_ccs_script_active.png).
So is there a way I can pass my CC values to the devices on the selected track when the CCS script is active ?
Thanks