Cannot Join Domain samba

[Rui Andrada]

Hi,

I'm refitting the network on my job, and need to install Windows 2k 
Professional on the workstations, but my Primary Domain Controller is a 
Samba Server.
I can't get w2k on my domain by any means! Win NT Workstation ans Server 
work just fine, but W2k is giving me the message: "The procedure number is 
ouside the allowed range" (or something like that..)
Has anyone been through anything like that?