Flex full screen mode -KRpano not visible/Unable to view KRPano embeded in flexIFrame in Flex FullScreen Mode

I am trying to display KRpano in Flex (using FlexIFrames).
In Normal mode it works fine but as soon as I switch to Flex FullScreenMode the KRpano hides out or it is invisible.This issue is in FullScreenMode only.

We require KRpano to be displayed in the FullScreenMode of Flex.Please do suggest any option.Please see attached files for the reference.
Thanks.
Abhilash