Weird Samba log messages

[Qubit]

We have three terminals running win 7, the server OS is Centos 5.11 (working on upgrading it) , Samba is 3.0.33.
Our main Access application has the backend MDB on the raindocks share and it has no problems.
I'm seeing strange messages in the samba log:

[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.bat
[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.cmd
[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.exe
[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.com
[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.pif
[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.lnk
[2015/11/09 02:07:48, 0] smbd/service.c:make_connection(1243)
bossy (192.168.1.109) couldn't find service raindocks.dll

Something seems to be prodding the samba server at 2am, looking for ???
raindocks is a shared folder and not any file's name.

here's global part of smb.conf:
[global]
# smb ports = 139
# force directory mode = 755
# force group = raincoast
# null passwords = yes
# encrypt passwords = yes
# passdb backend = tdbsam
# cups options = raw
netbios name = RAINMASTER
# locking = no
server string = Naboo Server
# path = /raindocks
# default = raincoast
# workgroup = WORKGROUP
# force create mode = 755
# force user = xxxxx
# os level = 35
# security = user
preferred master = yes
# write list =
# valid users =
local master = yes

guest account = xxxxxx
map to guest = Bad User
workgroup = WORKGROUP
security = user

here's the related raindocks service entry:
[raindocks]
# writeable = yes
path = /raindocks
# force group = raincoast
comment = raincoast shared docs
# public = yes
# create mode = 777
# directory mode = 777
browseable = yes
guest ok = yes
read only = no

and the homes:
[homes]
comment = Home Directories
path = /home
browseable = yes
public = yes
guest ok = yes
read only = no
writable = yes
; valid users = %S
; valid users = MYDOMAIN\%S

Also, it won't let me browse to the [homes] share for some reason.
All I want is for my three windoze boxes to have unrestricted access to selected folders on the Centos box.
Passwords are not really required, as there are only three people here and we all require the same trusted access.

Any thoughts on these messages, and the best way to open things up for local unrestricted access?
.q