RB450G PPPoE Chap not working

Anyone have a RB450G using PPPoE chap successfully? Provider supports it and works fine when using other (Tomato, DD-WRT) firmware.

what’s in Log?

PPPOE: initializing…
PPPOE: dialing…
PPPOE: authenticated
PPPOE: terminating…
PPPOE: disconnected

then repeats.. I suspect the MPPE isnt compatible or working.. i have it with encryption enabled and the LNS supports 40 or 128 bit (using auto)

does the mikrotik only do 56 bit? i cant see a setting to change it anywhere.