[otrs] Can't load link backend module Kernel::System::LinkObject::FAQ! at /usr/share/otrs//Kernel/System/LinkObject.pm line 149

Hi, We just upgraded Ubuntu to Gutsy and the OTRS was upgraded too. But now when a user clicks on the zoom option we receive the message: "Can't load link backend module Kernel::System::LinkObject::FAQ! at /usr/share/otrs//Kernel/System/LinkObject.pm line 149" How can we solve it? Thanks, Sebastian