[flexcoders] Trying to change Flex 3 ToggleButtonBar dataprovider on user or admin log in

[yonghan79]

Hi all,i'm trying to change Flex 3 ToggleButtonBar dataprovider on user or 
admin log in..I'm trying to use 2 viewstack,one for user,one for admin and i 
got a component where the login form is in the component..What should i do to 
define the dataprovider on the mainbased on user log in??Thanks a lot...