hi, i hope my bad english helping me to explain my problem

i have mikrotik pppoe server and i have a problem

the connection some times dropped automatically from active connection

and sometimes in interfaces appear connection

<pppoe-0>

this problem is not with all computers my computer is always connected without any disconnect

but some computers always disconnect after 1 or 2 minutes

Tip: i'm using API to add and manage my pppoe server

same problem ....
I have 3 pcs X86 (2 of them Mikrotik V6.1 & one V5.20) connected to radius manager

I discover that some users disconnected from all of them ( so the problem is not in the version of Mikrotik )

the users connect to our lan in different ways (direct connect from their PCs & from different Routers Dlink, TPlink...)