hotspot error msg 400

Namaste, Can anyone tell me what this is …
http://hsx.xxxx.xxx.xx/login?dst=http%3A%2F%2Fhsx.xxxx.xxx.xx%2Flogin%3Fdst%3Dhttp%253A%252F%252Fhsx.xxxx.xxx.xx%252Flogin%253Fdst%253Dhttp%25253A%25252F%25252Fhsx.xxxx.xxx.xx%25252Flogin%25253Fdst%25253Dhttp%2525253A%2525252F%2525252Fhsx.xxxx.xxx.xx%2525252Flogin%2525253Fdst%2525253Dhttp%252525253A%252525252F%252525252Fhsx.xxxx.xxx.xx%252525252Flogin%252525253Fdst%252525253Dhttp%25252525253A%25252525252F%25252525252Fhsx.xxxx.xxx.xx%25252525252Flogin%25252525253Fdst%25252525253Dhttp%2525252525253A%2525252525252F%2525252525252Fhsx.xxxx.xxx.xx%2525252525252Flogin%2525252525253Fdst%2525252525253Dhttp%252525252525253A%252525252525252F%252525252525252Fhsx.xxxx.xxx.xx%252525252525252Flogin%252525252525253Fdst%252525252525253Dhttp%25252525252525253A%25252525252525252F%25252525252525252Fhsx.xxxx.xxx.xx%25252525252525252Flogin%25252525252525253Fdst%25252525252525253Dhttp%2525252525252525253A%2525252525252525252F%2525252525252525252Fhsx.xxxx.xxx.xx%2525252525252525252Flogin%2525252525252525253Fdst%2525252525252525253Dhttp%252525252525252525253A%252525252525252525252F%252525252525252525252Fhsx.xxxx.xxx.xx%252525252525252525252Flogin%252525252525252525253Fdst%252525252525252525253Dhttp%25252525252525252525253A%25252525252525252525252F%25252525252525252525252Fhsx.xxxx.xxx.xx%25252525252525252525252Flogin%25252525252525252525253Fdst%25252525252525252525253Dhttp%2525252525252525252525253A%2525252525252525252525252F%2525252525252525252525252Fhsx.xxxx.xxx.xx%2525252525252525252525252Flogin%2525252525252525252525253Fdst%2525252525252525252525253Dhttp%252525252525252525252525253A%252525252525252525252525252F%252525252525252525252525252Fhsx.xxxx.xxx.xx%252525252525252525252525252Flogin%252525252525252525252525253Fdst%252525252525252525252525253Dhttp%25252525252525252525252525253A%25252525252525252525252525252F%25252525252525252525252525252Fhsx.xxxx.xxx.xx%25252525252525252525252525252Flogin%25252525252525252525252525253Fdst%25252525252525252525252525253Dhttp%2525252525252525252525252525253A%25252525252525252525252

:: I have masked my domain name with xxx

It just keeps repeating …
Because of this only bypassed ip can access internet.

Help Me.

Thank You.

Make sure that you have followed all requirements for HotSpot,
http://www.mikrotik.com/testdocs/ros/2.9/ip/hotspot.php

Check the logs on HotSpot router, probably there will be some useful information.