Ok so then it may just be the custom profile you have made up. Cant remember if you can save the drive parameters to a file with the older drives or not. If you can you could zip and attach along with your custom motor profile and I could see if I see an error.
Oh actually not sure if you can attach the custom profile, with the DSD drives you can save the motor data base but cant remember if you can with the DDM's, will have a look. Also the DDM's are restricted to one custom motor profile where you can have as many as you like with the newer drives, not that that matters to you, just thinking out loud really. Anyway will start up mater and see.
Hood