[Samba] Adding Samba Server to Windows AD Domain

[M Maki]

I'm having trouble adding a samba member server
to a Windows Active Directory domain.

samba server is version 3.0.28 compiled with ads support
on Debian Sarge. I've read the Samba ADS Domain
Membership HOWTO and followed it as best I could.

I am successful authenticating with
kinit -V mmaki at MY.DOMAIN.NET
Password for mmaki at MY.DOMAIN.NET:
Authenticated to Kerberos v5

Very minimal smb.conf
[Global]
  workgroup = MY 
  realm = MY.DOMAIN.NET
  security = ADS
  password server = dc1.my.domain.net

I'm trying to add the server with the command:
net ads -d 2 join -U mmaki at MY.DOMAIN.NET

The result is
lib/interface.c:add_interface(81)
  added interface ip=192.168.15.10 bcast=192.168.15.127
mask=255.255.255.128
mmaki at MY.DOMAIN.NET's password: 
libsmb/cliconnect.c:cli_session_setup_kerberos(613)
  Doing kerberos session setup
Using short domain name -- MY
rpc_client/cli_pipe.c:cli_rpc_pipe_open(2222)
  cli_rpc_pipe_open: cli_nt_create failed on pipe \NETLOGON to
machine DC1.MY.DOMAIN.NET.  Error was NT_STATUS_ACCESS_DENIED
utils/net_rpc_join.c:net_rpc_join_ok(70)
  net_rpc_join_ok: failed to get schannel session key from
server INPPWOADC1.MY.DOMAIN.NET for domain NPS. Error was
NT_STATUS_ACCESS_DENIED
Failed to verify membership in domain!
Failed to join domain: Success
utils/net.c:main(1036)
  return code = -1

A few things to note:
This is in a very large domain. I do not have Administrator
access to a domain controller. I can only add computers to my OU.
The member server account already exists on the server. My OU for
computers is
my.domain.net/PWR/A and B Network/HQ10/Computers

I've seen reference in the HOWTO for adding to a specific OU with
net ads join "Computers/BusinessUnit/Department/Servers" but
I'm not sure if the spaces in my OU "A and B Network" are
causing problems. When I use the command with the OU I get

Bad option: /PWR/A and B Network/HQ10/Computers
Failed to join domain: Invalid parameter

I've tried different ways of escaping the spaces
but I'm not even sure if that's even the problem.

Any suggestions would be greatly appreciated.

Mike