MikroTik

Hi all,
I'm Using Mikrotik OS for its Hotspot Server all is fine, But there is a small Problem that annoyed me.
The problem is all my users which are under and Access points login and logout Automatically and also they are logout from the hotspot and login many times on one minute.
My network Diagram is:
ADSL Router--------->Mikrotik Hotspot Server------->Main Wireless Router------>Access Points--------->Users under access points.
Please help me

login and logout automatically when they are in idle status or surfing the net not keeping some sessions opened !

check idle timeout and keepalive timeout options in users profile.

Thanks my friend,
But i want to clear that information to you:
1. I let all these configuration like idle & Keepalive Timeout all on default state.
2. that login and logout are occured at the same moment, but when i call google on my web Browser i logged out when the google is completely appeared to my PC.
thanks again my friend