Hardware Midi working in one project but not another

Hi,

please help wise MPC elder people! Experienced producer here but I am new to MPC world.

I have a project on my Live III that is experiencing midi hardware issues
I'm using the Clip Matrix to play live with this project.
I'm using a midi keyboard to trigger hardware synths via the MPC Midi track.
If I set up a new project, midi keyboard triggers hardware synths just fine.
If I open problem project, the same keyboard will not trigger hardware even if midi routing (inputs/outputs) are exactly the same. WHen i press a key on the midi keyboard I can see the midi light up the LED next to the touch strip but this midi is not being outputted to the hardware synth.

Midi is being sent from the keyboard to mpc via midi cable not USB and from MPC to hardware via midi cables.

SO just to clarify, this is a project specific issue. I have checked Track Mutes and the channel is not muted. The channel is armed, all settings are exactly the same as when I started a new project.
I'm a new MPC user so what do people normally do in this situation? start a new project and import sequences and start afresh? or is there something I may have missed that could be preventing midi from getting from a to b?

FIX!!!! I resolved this problem by long pressing the Touch Strip button. Apparently it can also be fixed by opening the Midi Monitor.