DL4100 cannot join to Domain

[ERmorel]

Hello,

See if the following link helps:

EX2100 Joining domain problems

I am having real problems joining this device to my domain.  I have tired every combination of names, domain names, etc to try this and each attempt results in a Failure to join the domain message. Can someone help me with this?  I have considerable networking experience yet I have never had so much trouble joining a device to the network. Thanks, Terry