Maybe this will help: From Nortel-
BCM 4.0: New install of Element Manager Version 2.44 cannot connect; displays Device Login Error
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Problem Description
When attempting to connect to Business Communications Manager (BCM) 4.0 systems using a new installation of Element Manager Version 2.44, the target BCM may issue a request to download BCM cartridge BCM200.2.76-0.
In the described scenario after cartridge BCM200.2.76-0 downloads, an information window indicating a "Device login Error" occurs.
Error description: Error Happened: Error Details: MoFObject Factory can not be initialized; Error in Loading MoF Files: java.lang.NullPointerException
Subsequent attempts to connect from the same client PC with Business Element Manager Version 2.44 immediately responds with the same error.
All client PCs that have downloaded Element Manager 2.44 from the BCM at the reporting site exhibit this issue.
Technician and/or partner PC with Element Manager Versions other than 2.44 can connect to the BCM.
Element Manager Version 2.44, does not contain a cartridge for BCM 4.0 and cannot initialize the proper cartridge as there are none available in the application's cartridge library.
This condition is observed when downloading Element Manager Version 2.44 from newly installed BCM 4.0 systems that have the following combination of patches applied:
BCM.R400.SU.Desktop.004-200711
BCM.R400.SmartUpdate.Desktop.005-200801
BCM.R400.SU.System.007-200801
BCM.R400.SmartUpdate.Desktop.005-200801
BCM.R400.SU.System.007-200801
BCM.R400.SU.Desktop.004-200711
BCM.R400.SU.System.007-200801
Problem Resolution
Applying an older version of Element Manager cartridge for BCM 4.0 (numerically lower than 76-0) to the affected PC corrects this condition.
1) To download such a cartridge numbered lower than 76-0 for BCM 4.0, go to
Cartridge libraries are maintained for each BCM platform and release.
2) To locate the cartridge folder for the instance of Element Manager on the user's or technician's PC:
a) Right click Element Manager Shortcut, display "Properties" and select Find Target button.
This places Windows Explorer in the "bin" folder for Element Manager where the EM executable (bem.exe) resides.
b) Select Registry folder and open it.
Explorer should now display two folders, "Cartridges" and "Detectors".
c) Open the Cartridges folder and copy the older 4.0 cartridge downloaded earlier to this folder.
3) Close and re-open Element Manager if the application was running during the copy operation and verify connectivity to the BCM.