I know there are issues with Ruckus 9.7 firmware and Guest Access but I am running 9.6.2 and am having issues.
Android works fine, but iOS 7.1 tries to display the guest login page but then says disconnected from network. If I browse to a webpage then the portal page loads and works correctly.
It appears to be that initial authentication page you get when first connecting to wireless. I haven't tried iOS 7.0 so not sure if it works on that either.