[Samba] ACL changing problem

[NetRacer]

hi all,

i've a litte problem with my samba 2.2.7a running on SuSE 7.3 with a
kernel 2.5.59:

if i try to change any file acl from my win-client an error occurs
"the network name is not longer avaiable" (orig: "Der angegebene
Netzwerkname ist nicht mehr verfügbar.")

does someone know whats the problem and how to solve it?

thanks
  NetRacer