erm well i manage to solve it as it is due to nvidia firewall so i download its uility and shut it off. And the wall disappear.

But the funny thing is when i use LW(totally exit & enter) with secure tunnel software(start first), the wall is there after it connected but when switch to NO PROXY and re-connect(LW no exit) the wall disappeared.

So i just dis-connected LW again and change setting back with proxy then re-connect(no exit for LW), the wall never re-appeared.

Why is that so?