i have a 24.4.2 ai mixer and have it hooked to a windows 10 pc running protools 12. i have it hooked by firewire on a presonus compatible firewire card. my problem is pops and clicks when i try to playback the audio thru the mixer using the firewire returns to each channel. its not recording the clicks and pops . its only when i try to play back using the digital returns to each channel. any ideas guys????