[kde-linux] Kopete is catching my Ctrl-Shift-C, how to disable it?

[susing]

Hello,

   I assigned Ctrl-Shift-C to Konsole for Copy text action, after I installed Kopete I found it catched this keystroke(Ctrl-Shift-C bring Kopete from systray to desktop, Ctrl-Shift-C again bring it back to systray). I checked through Settings -> Configure Shutcut, but I can't find such keystroke assigned to any Kopete action. So how to disable Kopete from catching this keystroke?

   Thanks.