When i open my messanger and find someone to video call with its says my mic worksa dn it worked the frist time nd now the second time it can "hear" my voice

Make sure the webcam mic is set as default - this is especially important if you have a laptop with a mic or use a headset with mic

Typical audio set up

Laptop with mic x webcam with mic x Vista x Yahoo Messenger 10

If you have an earlier OS, you may have to access your hardware from the Control Panel.

Plug in the webcam

TEST SPEAKERS

Right click on speaker icon in System Tray or from Control Panel
Select "Playback Devices"
The speaker icon ( checked as working) and volume level graph should be visible
Right click on the volume graph and click "Test"
Left hand speakers followed by right hand should be heard

SET DEFAULT & TEST MIC

Click "Recording" tab.
To set required (webcam) mic as default - click on mic font to highlight and click "Properties"
In lower dropbox display "Use this device enable" click 'OK'
Click "Levels" tab and ramp up sliders ( adjust to suit later)
Return to "Recording". Test mic by speaking and make sure volume graph displays

Restart computer

CONFIGURE TO MESSENGER

Open messenger - on top toolbar. Left click ( > ) Messenger > Preferences > Connection - Select 'no proxies' or 'connect direct to the internet' depending on the version of messenger you have
make sure your internet connection and country are correct in the lower two boxes > Apply > OK

Click ( > ) Messenger > Preferences > Video and Voice
Set webcam mic and speakers to show Default equipment
Open Video and Voice Setup to test audio equipment
Click 'Place a free test call'
Check box 'Allow USB devices to access Messenger'
Click 'Apply' click 'OK'