In ProTools menu check Setup > MIDI > Input Devices and make sure all WaveRider ports are checked.
We also found that if you have M-Audio USB Support.plugin or any other 32 bit driver in your MacHD/Library/Audio/MIDI Drivers folder this can be the cause. Simply remove this driver & restart and all is good.
Alternatively, please run the WaveRider installer and tick the box next to WaveRider_32BitDriver when presented. This will install the 32 bit driver that will load the MIDI ports.
