INPUT SOUND PROBLEM

HI...

I am using compaq presario notebook laptop  CQ43-300TU , Serial number: 5CB1433ZTW, Product number: QG455PA#ACJ  IN Windows 7 Ultimate 32-bit ...,

I AM FACING PROBLEM FROM INPUT AUDIO RECOGNITION...MY LAPTOP IS NOT ABLE TO HEAR MY  VOICE...WHENEVER I USED TO VIDEO CONFERENCE WITH OTHERS...I AM NOT ABLE TO SEND MY VOICE TO THE RECIEPIENT...BUT I CAN LISTEN THEM VERY WELL...

please problem best solution for it.

Thanks

Regards

NITESH KUMAR