networkdiscovery find IP of one of Devices but not connect to each other

hi guys
i create a lan multiplayer game for android whit unet
I used Network Discovery to find the devices.
and install my game in 2 android device…
i turn on wifi of one of them and turn on hotspot other one
i press initilize broadcast and start brodcasting in one of them and listen to brodcasting in other divice
so the listening divce find ip of other device
but when i press "Game at ::ffff:: " nothing happeing …
what i must to do???

Somebody Please Help Me…