Auditory Files Not Playing

I am using .wav files for audio in an experiment. we are running an auditory Stroop protocol with high and low pitches presented. I am using SuperLab 6 on a Mac. The audio works of my .aifc files contain verbal instructions - so I know it’s not a microphone issue. I have tried changing the input and correct response options and have had no luck. The only way I can get it to play is if my input is set to “immediately after the event is presented” - however it then only plays 1 of the 4 pitches. I have tested all the files outside of superlab and they are working properly. Any help or suggestions would be appreciated. I can provide additional information if needed.