[Google Maps API v2] mymapstoolbar example don't showing length

I have problem with mymapstoolbar example
http://gmaps-samples.googlecode.com/svn/trunk/poly/mymapstoolbar.html
I draw line, double-click and stop drawing a line. But length of line
don't showing. When I edit the line lenght is show. I need to display
the length after drawing a line.
Thanks

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