Menu button with a TypeError: Error #1009

Hi everybody,

I’m working on a Flash CS4 presentation which has a menu page as well as a navigation bar (with a timer) that appears for 5 seconds and then disappears until the user moves the mouse again.

The play and stop buttons are working fine but when I click on the menu button it takes me back to the menu page but then I get this Flash error message:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at ADAGIO_3_fla::MainTimeline/showmenu()

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at ADAGIO_3_fla::MainTimeline/hidemenu()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at flash.utils::Timer/tick()

I don’t know if it’s an issue with the timer or something else that’s missing.

I posted the fla here if anyone can check it out.

http://rapidshare.com/files/345010518/ADAGIO_3test.fla

For now only the 3rd menu button is active until I’m finished.

Thanks in advance