Altium 6.6 trace invisible issue

Hello friends,

I am using Altium designer 6.6, when i route a trace the trace is invisible until I click and go for next angle, same goes for adding polygon,line, etc., feel like I missed some setting in tools preference. Please help me on this issue it?s urgent

thanks,
Jay

This is RF forum, maybe you can find help in PCB forum.
Although I use Altium, but I never met your problem.
Maybe the clearance in the rules is too big, you can try to set it smaller.