Exactly same problem was with Sygate firewall few months ago... there are some topics in these forums regarding that issue. I was too tired to "fight" with Sygate, and I switched to Outpost - unbelievable light on system resources and way better than Sygate.
I've heard that they solved that problem at Sygate, releasing new build, although I never switched back to Sygate...
Try to send your question to Look'n'Stop technical support (if they have it) and see what they have to say about that issue... I know that many people contacted Sygate guys regarding same problem with Sygate. It seems like it helped.
Cheers !