Internal Hotspot after accepting terms return to terms site

I have configured Internal Hotspot with ToS Registration Mode.
If i try to connect to internet with my browser i can see captive portal with terms site. That is OK. But if i click on "I Accept" it does not make redirect to site from internet (like google or any other). It redirects me again and again to internal terms site.
If i close browser and open it again, i can access any internet site without terms site on captive portal. That means i was registered after clicking on "I Accept" button.
I don't understand why is that so.

HotSpot Configurations
HotSpot Type: Internal HotSpot
HotSpot Mode: Wireless Only
HotSpot LAN Access: Allow

Internal HotSpot Configurations
Registration Mode: ToS
Web Protocol: HTTP
RADIUS Protocol : CHAP

Can somebody help me
I am very sorry for my bad english
Thank You