network neighborhood not working...

[Philip Lewis]

Background:
Our subnet:128.2.224.*
samba machine 128.2.224.1 (tmc1) AIX 4.2 using precompiled binaries
NT Server 128.2.224.6 (tmc6)
nt 4.0 workstation 128.2.224.37 (tmc37)
smbd/nmbd version 2.0.5a
smb.conf
-----------------------------------------------
workgroup = TMC
guest ok = yes
hosts allow = 128.2.224.
dns proxy = no
#interfaces = 128.2
security = SERVER
password server = 128.2.224.6
[tmp]
 comment = temporary files 
 browseable = yes
 path = /tmp
 read only = yes
-----------------------------------------------
comments on diagnostic walkthrough
http://us1.samba.org/samba/docs/DIAGNOSIS.html
#1 - #4 ok
#5 returns nothing or rather:name_query failed to find name *
#6 returns 128.2.224.1 (the samba client)
   tmc1> nmblookup -d 2 '*'
   Added interface ip=128.2.224.1 bcast=128.2.255.255 nmask=255.255.0.0
   Sending queries to 128.2.255.255
   Got a positive name query response from 128.2.224.1 ( 128.2.224.1 )
   128.2.224.1 *<00>
#7 ok and i can mount shares on tmc6 from tmc1
#8 works for full name (tmc1.astm.cmri.cmu.edu) but not tmc1
   it fails with system error 53: network path was not found
	i've tried adding tmc1 to my (tmc37) lmhosts file, no luck. 
	we are not allowed to run our own wins here. 
#9-10 again, works with full name (tmc1.astm.cmri.cmu.edu)
    also "map network drive" works if i put in the full name it then
shows tmp being available

any ideas why i cannot "browse" tmc1 from network neighborhood?


cc's appreciated.
thanks
flip