hi, i have a wierd problem here! have a rb532 with sr2 installed as a core router for 2 ntworks. Internet is fixed wireless, ether 1 is used as wan; ether 2 3 are bridged and thers a dhcp server running on it; wlan is on configured for diffrent network. everything works fine but when i run the hotspot over them i had a frequent disconnect problem; not for connecting and disconnecting of AP but the hotspot.! any ideas ? 
hi ozgr;
its better to have some more detailed info on your setup but
did you check the idle time out, session time out values in the hotspot ?
moreover
if there are CPE devices in buildings or high density residential places connecting more than 2 people from a same device, you should increase the
ADDRESSES PER MAC field in the hotspot server conf. as some CPE devices only transmit their own MAC to the system.