Hi
If you are running WinGate 6.0.4, then the only version of KAV that works with that is 1.2.2.
there is a new version out, but you need to upgrade both wingate and the plugin.
The problem you are seeing is due to the dual licenseing system. There are 2 licenses for KAV, a Qbik one (one we issue), and one that Kaspersky Labs issues. The KL-issued one expires. You need to go to
http://www.wingate.com/download.php
select KAV, and download the Kaspersky Labs key file. Put this in the folder
WinGate\Plugins\Kaspersky AntiVirus
And restart WinGate.
Regards
Adrien