Hi
Our file server is Netware 6.5 SP4 and the clients are running WinXP SP3 with NWClient 4.90 SP2.

Since few days, one computer has login and connection problem. On each reboot, when it scrolls down the login script, it tells me that the computer is attached to the server, and shows me a series of error messages(a copy of these messages is below).

What results is that the computer is not connected to the server and i cann't create manual MAPs, while the IP pile works correctly(i can ping other computers)

The user on this computer belongs to the Users group and whenever i switch him into the Administrators group, the problem disappears.

I have already uninstalled the NWClient and reinstalled it again. I don't have any idea why this problem occurs now, without "any reason".
It's impossible to leave the user in the Administrators group permanently

Here's a complete copy of the error messages, translated from french:
You are attached to the server XXXXXX.
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured: 18 (8801).
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured : 9 (8801).
LOGIN-LGNWNT32.DLL-918 : this utility did not found connection informations
Error code : 8801.
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured : 13 (8801).
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured : 15 (8801).
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured : 9 (8801).
LOGIN-LGNWNT32.DLL-918 : this utility did not found connection informations
Error code : 8801.

LOGIN-LGNWNT32.DLL-890 : the specified server was not found
(the name of the server)
LOGIN-LGNWNT32.DLL-890 : the specified server was not found
(the name of the server)
LOGIN-LGNWNT32.DLL-890 : the specified server was not found
(the name of the server)

----- Search units -----
S1: = C:\WINDOWS\system32
S2: = C:\WINDOWS
S3: = C:\WINDOWS\System32\Wbem
S4: = C:\Program Files\Intel\DMIX
S5: = C:\Program Files\ATI Technologies\ATI.ACE\Core-Static
S6: = C:\WINDOWS\system32\nls
S7: = C:\WINDOWS\system32\nls\FRANCAIS
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured : 13 (8801).
LOGIN-LGNWNT32.DLL-923 : an unexpected error has occured : 15 (8801).

Thank you for your help