i have an acer TraveMate P238-M which only has one audio jack, so its a combo. when i plug in my headset with an adapter so the mic and the headsets speakers combine, it only recognizes the headsets speaker and uses the laptops microphone by default. the headsets work phone on my iPhone. I have tried plugging in the microphone jack from the headset alone but the laptop thinks its headphones. The other day it worked perfectly untill the next day. Please Help!!!!!