Black Mesa not saving audio options

Is there anyway to keep Black Mesa from not saving the audio option as headphones because I have headphones and it keeps reverting back to 2 speakers.

bump sorry but I need help.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valveā€™s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.