Could not record voice on Acoustica, but mic working on Gtalk

Hi Techs,
I do not know if any one of you are familiar with the software Acoustica. It is a program in which you can record music whether it be acoustic, then you can blend your own voice with it.I am using a headset with it. I tried recording. I am singing and all along, it is not actually capturing my voice.I tried it in a call, specifically in Gtalk, but unfortunately, my friend on the other line cannot hear me.
Well, first and foremost, I made sure that I am not on mute. I do not have another headset to try. I just want to know if there are other ways for me to isolate the issue and find out where the problem really lies.
Appreciate if somebody can answer.
