session does not work in mobile application

Hi guys,
What could be happening?

i can access my site(restrict area protected with sessions) through my computer but i can't access with mobile 

i'm not know more what to do with this problem


plz help me 

Little question:
Is the login form in an iframe? If yes,different domains?
Do you use an other domain for the mobile page? E.g. mobile.example.local /example.local
Apple phone or an android?
What Mobile Browser do you use?