When I call skype to skype I can hear them but they can't hear me

There are two obvious reasons (and a number of not-so obvious ones) for this.
1. Have you got your sound on (and adjusted properly) ? You might have your sound turned down or off on your PC or just within Skype. To test if your sound is working, try making a test call using the Skype test call facility.
2. Your friend's microphone may not be working, they may not have one or its sensitivity in Skype may be turned down or it may be 'muted'. Ask to check that her microphone is not muted. Ask her to make a test call on Skype and adjust her microphone sensitivity so that she can hear herself sensibly.

On my version of Skype the test call has appeared in 'contacts' but now it is accessible from the menu at the top left of the window from the call > audio settings menu/page. You can change your volume, microphone and speaker sensitivity settings on that page. You may have a different version of Skype of course.

21. April.2014

Have you checked to see if you microphone is muted? Go on control panel, then Hardware and Sound, then Sound, then manage audio devices. Go on recording, click microphone, then levels and if it is not on high volume drag it so it is, the click ok. If it was muted, then this should have fixed the problem.

Try running through the skype sound setup guide here to make sure that you have everything setup correctly.

http://www.skype.com/intl/en-gb/support/user-guides/sound-setup/

Thanks

On the new skype the mute and video buttons are moved around. Just make sure that you are not accidentally muting yourself and check whether the video button turns you camera on and off.

If neither of these are the problem, go into the skype preferences and click the Audio/Video tab and check that your audio and video adapters are correct in the drop down menus.

First check the volume mixer by the clock on your computer and make sure it is turned on. Also check the volume setup in Skype.

Your laptop may have a mute button somewhere close to (but not on) the keyboard. Make sure that is is not muted.

for Skype, click tools>options>sounds> click "enable all sounds" if it is muted.

Reinstall your sound card drivers.Reboot the PC.Then reinstall Skype.Then setup Skype with the type of mic that you have.

You mean "I can hear the other party but they cant hear me"

Skype probably didnt change your microphone.

Go to Skype Tools>Options>General>Audio Settings and on the Microphone dropdown menu, make sure your headset is selected. If it's installed correctly and you talk into it, you should see the volume bar start moving. Click save and start talking!

This is assuming you've already gone into sound proporties in windows and made your headset the default microphone and checked the volume settings on it.

If the mic is really been muted, do the following:
Start -> Control Panel -> Sounds and Audio Devices -> Voice [tab] -> In Voice Recording area press "Volume..." button -> check if "mute all" is unchecked and adjust the slider to proper position

Go to start then control panel you should see a tab called hardware and sound click on it and you should find your microphone there and you can unmute it from there. Hope this helps you