help-usermanager and problem with end of session

hi ,
I am new to routeros .
I figured out my routerboard 750 g for pppoe server and usermanager for radius.
every thing is ok but I have a problem witch cause after disconnecting pppoe connection by user the time left for him is still counting down.
in radius section of routeros I ticked incoming with port 1700 and 3977 but not work.
in pppoe server I configured one session per host and keep alive time out 1. it also did not work.

*excuse me for poor english :smiley: *

have anyone some answers for me? :frowning: