Cant delete or modify files in roaming profiles Win XP client

[gdavidvlk]

I already saw some post dealing with this issue, but it was without any reply from the community :|
So I post it again, hoping somebody found the solution.
The issue is this: you can NOT delete or modify (you can create new) files created in roaming profiles directories (i.e.  Desktop or Documents) when accessing from XP machines others than the one you used to logon for the very first time after your user was created in ebox server.
Only that particular machine (the one that firstly created the user directories in ebox /samba/profiles at user logoff time) can modify or delete the user's files.

Does anybody issued the same?
Can please developers point me in the right direction to investigate?

Thanks!
g

P.S. Here my updates

# apt-cache policy ebox
ebox:
  Installed: 2.0.3
  Candidate: 2.0.3
  Version table:
 *** 2.0.3 0
        500 http://ppa.launchpad.net/zentyal/2.0/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status
     1.5-0ubuntu1 0
        500 http://it.archive.ubuntu.com/ubuntu/ lucid/universe Packages

# apt-cache policy samba
samba:
  Installed: 2:3.4.9-0ubuntu1
  Candidate: 2:3.4.9-0ubuntu1
  Version table:
 *** 2:3.4.9-0ubuntu1 0
        500 http://ppa.launchpad.net/zentyal/2.0/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status
     2:3.4.7~dfsg-1ubuntu3.2 0
        500 http://it.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
        500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages
     2:3.4.7~dfsg-1ubuntu3 0
        500 http://it.archive.ubuntu.com/ubuntu/ lucid/main Packages


_____________________________

Update

Some little steps beyond.
Everything seems to work fine if I don't use a particular machine (the one i mentioned as the only good-one).
It seems that something go broken if that particular "sick" WinXP machine access and modifiy files and then logoff.  From that moment on, the modified files can be deleted or furthermore modified ONLY from that machine.

Using "non-sick" machines produces no problem and the profiles are correcty sync to the server.
I have no idea on what can be on "sick" machines. I'm performing windows updates trying to solve the problem.
Any help is aprecieted.
g