android encryptedlocalstore not working

hi,

i have a problem in my mobile application

i use encryptedlocalstore to store user id and password and packaged apk with captive-runtime

but some device without adobe air, store and get data with encrypedlocalstore not working

when i install adobe air at this device, encryptedlocalstore working.

it bug with packing apk captive-runtime?

i use flash builder 4.6 and air sdk 3.1