Hotspot - trail deleted after reboot

Dear all,

i setup hotspot and active the trail service

but we i reboot the router all mac that have trail in ip>>hotspot>>users section get deleted and the users that use (trail)
before will be able to use it again.
even that i setup the trial up time reset to 180d 00:00:00

how could i stop that ?

so no one see this problem just want to know what to do >???

Up UUP

Up UUP

same problem..