right click the speaker near your clock, and choose OPEN VOULUME CONTROLS
then click OPTIONS at the top and then PROPERTIES.
where it says ADJUST VOLUME FOR pick RECORDING (it should be on PLAYBACK now)
make sure you have MICROPHONE box checked and click OK.
adjust your MICROPHONE voulume up towards the top, exit out, and go into AH.
once in Aces High, type .radio 5 (then your ah name) i.e. .radio 5 WMLUTE, or hit the / and under the 5th box w/ the V, click it, backspace whatever is there out and type in your name.
Then you can use T to talk, and see how you sound.
lemme know if this helps.