no sound.. help!!

hey.. can any1 help me out.. i got this furikup workin after a lot of effort but now whenever i make a call, i hear some cracking ringtone but when it says call established, i hear no sound at all.. tried many diff numbers but the same thing.. but person on the other end can hear me..!!

im using FWD from freeworld dialup.. using chotto shot as usbcam.. psp phat with m33 4.01 n my config goes like this..

server=fwd.pulver.com
username=912758
password=********
stunserver=stun.fwdnet.net
stunport=3478
input=usbcam

plz help me out any1