hehe 
What I found to be a problem. The problem to be very trivial.
File lastret.txt not be current, and the date was the September 1.
I probably can not set WXSIM to create this file automatically.
I manually update the file and now everything work. 
But I see a small error. On the charts, after moving the cursor, do not display values. I get a blank label.
Can I fix this? How?
thanks
andretti