menu items button in android tablet application not displayed

I used to build my tablet air applications with flex sdk 4.5.

I test it mainly on Galaxy Tab .

When i upgraded to 4.6 sdk, I noticed that the system bar didn't displayed buttons anymore. it is completly empty.

and  viewMenuItems didn't work anymore, too.

is someone noticed  the same problem?

Could it be a air runtime bug?

I'd like to keep on working with sdk 4.6 for softkeyboard capabilities; please help me. Is there a solution?