Multi touch does not work ?

i have two button in my screen that i have to press it in the same time but  when i test my game in android device i  cant press the two button at the same time !!! help how to activate multi touch (i enable it in setting mobile user input but it still not work)  in stencyl or something like that ?

http://community.stencyl.com/index.php/topic,51910.0.html