[Samba] homes on different subnets with smb pdc bdc /ldap, automatic home mapping sporadic failures

[RRuegner]

Hi Samabatistas,
I have a ldap smb pdc and a ldap smb bdc in a different subnetc.
connected via a vpn
Users work at the place of the pdc have their home and their profile there,
Users working on the place of the bdc have their home and their profile 
on the bdc.
I did this with editing their ldap attr. on the pdcs ldap master
this works like charme, but sometimes
the automatic home drive mapping fails and i have such entry in the log
this behavior is not permanent , anybody a idea what might be the failure?
i recognized the failure mostly appears if a wins proxy on the fire wall 
get restarted is it a thing with wins?
add info ,no failure with the profiles appear

[2004/03/27 15:09:44, 2] smbd/service.c:make_connection(809)
   [homes] share not available for this user because it was not found or 
created at session setup time
Best