a very bad problem

hi all
i have a very strange problem in my server

first : -

some clients have no ping to gateway and dns and other have normally and when i restart the server they have net normally

second

when the user working on internet normally he loged out the the login page come to him and when he try to login the server refused to accept the user name and password and after a while he accepted it and after a while he loged him out again

i try to solve this problem

i changed the lan card and the cables and the same problem

please tell me how to solve this problem

thanks

Please explain a little bit better..i.e what configuration you have, what version of RouterOS etc etc. And also, post just once please..

dear

i use a hotspot not a pppoe server

version 2.9.27

what else do you want to know

thanks…
i didn’t thought you have a pppoe server…so..

Anyway…upgrade to the latest version first…and come back later

oh, it’s very old version - just update to 2.9.51, and all will be fine =)

hi all

and thanks for your impotance

i have a question

hw i can upgrade to the latest version

thank you

http://wiki.mikrotik.com/wiki/Upgrading_RouterOS