The server has not validated the user's name or password. Make sure the name and password fulfill the following requirements:
Correct spelling.
Correct format for upper-case characters. A tilde (~) must precede each one.
Satisfaction of the following system limitations:
NetBIOS has a 14-character maximum.
NetWare has a 30-character maximum with TAS.
AppleTalk has an 8-character maximum.
Users with account names or passwords longer than eight characters may have difficulty making connections. On many UNIX systems, only the first eight characters of the password matter, so you may establish a connection by providing only the first eight characters of the password.
On systems with password aging supported and enabled, the password may have lost validity. Have the user log in to the UNIX host at the console or with a terminal emulator such as telnet and update the password.
The user name lists as restricted. Follow these links:
realm->Manage File Services->[select the file service] ->Administer->Authentication and Service Mode Options
If you chose the LM-NT-OS/2 or NetWare realm, choose the authentication type. In the screen that appears, check User restrictions. If the user name does not appear in the Users field with Allow selected, enter it. If the name appears in the Users field with Deny selected, delete it.