[Tkinter-discuss] bind <Alt-[1..5]> not working

[rhoit]

I'm trying to bing <Alt-1>, <Alt-2>, <Alt-3>... <Alt-9> to switch the 
ttk.Notebook() tab. but Alt-[1..5] doesn't seems to work any help!

test code is here
https://gist.github.com/6583664