Brother MFC-J5945DW

My Brother MFC seems tobe incompatible. It supports SNMP 1 and 2c but the results are weired. Papertray is always critical and Ink is also always critical. There seems to be no way to get the expected results. I have about 500 MFCs.
Thats the check line for Paper Tray: /etc/naemon/libexec/check_drucker.php 10.xx.xx.xx internal v2c paper 3
results are -2 or -3
Counter works perfect, and so is SNMP-Alive and Hardware. For Hardware it says OK – Brother MFC-J5945DW Status=2. Not really sure what status 2 meens, but as long as Status is ok, I guess it is.
Any idea what could cause the problem?