samba - Sep 2003 - sharing folder in clients problem

Hi, I want to ask if anyone is having problems getting the remote user list 
when try to share a folder in 
User-level Access Control. When i try to share te folder i get the following 
error:

[2003/09/11 18:36:41, 1] smbd/ipc.c:api_fd_reply(284)
  api_fd_reply: INVALID PIPE HANDLE: 0
[2003/09/11 18:36:42, 1] smbd/ipc.c:api_fd_reply(284)
  api_fd_reply: INVALID PIPE HANDLE: 0
[2003/09/11 18:36:42, 1] smbd/ipc.c:api_fd_reply(284)
  api_fd_reply: INVALID PIPE HANDLE: 0
[2003/09/11 18:36:42, 1] smbd/ipc.c:api_fd_reply(284)
  api_fd_reply: INVALID PIPE HANDLE: 0

the system installed is debian woody 3.0, kernel 2.4.20, xfs filesystem with 
quotas, samba version 3.0.0rc3, Openldap 2.1

I previusly use samba 2.2.XX like a PDC working fine for two years and try to 
install samba 3.0.0rc3 in another server, almost 
everything work fine, but if a client machine (all machines are windows 98) 
with a shared folder try to log on the network and 
the the client machine share a folder, concurrently in all the machines with a 
shared folder (in User-level Access Control) 
appears a blue screen with the error 0028:C0004D3F IN VXD VMM(01) + 00003D3F, 
that for a while I atribute to "unknown reasons" 
of samba. Later I found that the problem was originated in the imposibility of 
get the user list to validate users accesing the 
shares.

Any advice? 

PD: Sorry my bad english.