Email function not working. I cannot send emails

There's no problem with email function.
With clipshare and AVS script we provide email script witch is called when you press "SEND" button on player.
Such script takes sender email address from script's configuration settings.
But if you did not set admin email address, or it is invalid of course email won't be sent.
So make sure, that you set valid admin email address in your script.
Alternatively you can always set custom email address in email script that we provide.
Usually this is variable: '$admin_email = 'xxx';
in file "sendmail.php".