First NDMP backup proving to be a challenge...

NBU Enterprise 6.0 MP4 on Windows 2003 backing up a Sun StorEdge 5320

I'm running the first "test" backup of very little data on /array2 using
remote NDMP to my master/media server.  I've configured the client w/
the "root" (administrator) password, and authtication looks ok.  

set_ndmp_attr -verify nas_server

Connecting to host "nas_server" as user "administrator"...
Waiting for connect notification message...
Opening session--attempting with NDMP protocol version 3...
Opening session--successful with NDMP protocol version 3
  host supports TEXT authentication
  host supports MD5 authentication
Getting MD5 challenge from host...
Logging in using MD5 method...
Host info is:
  host name "nas_server"
  os type "StorageTek"
  os version "Version 4.20 M2 (Build 3) "
  host id "ST5320200702140032"
Login was successful
Host supports LOCAL backup/restore
Host supports 3-way backup/restore

When I run the job it mounts a tape, goes to "begin writing" then fails
with...

5/9/2007 9:33:08 AM - Error ndmpagent(pid=4572) ndmp_data_connect_v3
failed, status = 23 (NDMP_CONNECT_ERR)       
5/9/2007 9:33:08 AM - Error ndmpagent(pid=4572) NDMP backup failed, path
= /array2       
5/9/2007 9:33:15 AM - end writing; write time: 00:01:24 NDMP backup
failure(99)

Output of vxlogview -i ndmpagent

5/8/2007 15:28:27.764 [Info] V-134-3 started process ndmpagent
(pid=2000.844)
5/8/2007 15:28:27.764 [Warning] V-134-255 Unrecognized parameter
-use_otm
5/8/2007 15:28:27.764 [Warning] V-134-255 Unrecognized parameter -fso
5/8/2007 15:28:27.764 [Warning] V-134-255 Unrecognized parameter
-use_ofb
5/8/2007 15:28:27.764 [NdmpAgent::CheckLogLevels] DiagLevel = 1
DebugLevel = 1
5/8/2007 15:29:12.797 [NdmpMoverSideShm::CreateServer] Using hostname:
nbu_master
5/8/2007 15:29:12.797 [NdmpMoverSideShm::CreateServer] Creating server
for 132.1 58.206.180 in Server Port Window 1025 to 5000
5/8/2007 15:29:12.797 [NdmpGlueLogCb] ndmp_open_and_auth_via_host:
hostname=pbnf s, via_hostname=nas_server
5/8/2007 15:29:12.844 [NdmpGlueLogCb] ndmp_open_and_auth_via_host: using
NDMP pr otocol version 3
5/8/2007 15:30:28.846 [Error] V-134-90 ndmp_data_connect_v3 failed,
status = 23
(NDMP_CONNECT_ERR)
5/8/2007 15:30:28.877 V-134-19 [NdmpAgent::SetErrorAndHalt]
NdmpDataSideNas.cpp(
645) - error code 114 (unimplemented error code 114)
5/8/2007 15:30:28.877 [Error] V-134-32 NDMP backup failed, path =
/array2

>From what I've read of the Netbackup configuration I should be good.
I'm not managing the NAS itself, so I'm not sure what options are
avalible there.. But is there anything else I should be doing from my
end to make this thing work?

Thanks as usual...

-Jonathan

PS: HDS SAN FTW