Sir,
i have using routerboard 450g as pppoe with an external radius server.
when i try dial-up from my desktop,the routerboard log file showing error " pppoe ppp error could not add queue: in-burst-limit lessthan in-max limit(6) " where to change this limits…
your PPPOE connection is not able to establish because the connection properties that the mikrotik is getting from the Radius server is borked.
Look at the user in your radius server and make sure any overiding radius attributes have not got your bursting limit higher than your max-limit.
It could also be in the group that your user belongs to.