"System error 1240 has occurred"

I'm running a windows 2003 mixed mode domain. From a windows 2003 member
server I am unable to map network drives to any other NT4 or 2000 servers
EXCEPT for two 2003 servers running AD. Using netuse from a command prompt
the following error occurs:
"System error 1240 has occurred"
"The account is not authorized to log in from this station"
When trying to browse My network places, I'm not able to expand any server
except for the 2 servers running AD.
Any one have ideas on why this is happening. Probably a Local Security
policy setting, not sure which on though. Thanks.

this may help. quoted from http://www.ChicagoTech.net
System Error 1240 - The account is not authorized to login from this
station.
Symptoms: 1. You may get the system error 1240 when using net view
\\remotecomputer'
2. "Workgroup_name is not accessible. Account is Not Authorized to Log In to
this Station" when attempting to browse the workgroup from a networking
computer.

Resolutions: 1. Use Regedit to enable unencrypted (plain text) passwords for
the SMB client.
2. Enable Send Unencrypted Password to Connect to 3rd Party SMB Servers
under Local Security Policy.
3. Set the following policies as showing:
Digitally sign client communications (always) - disabled
Digitally sign server communications (always)- disabled
Digitally sign server communications (when possible) - disabled
LAN Manager Authentication Level set to Send LM and NTLM - use NTLMv2
session security if negotiated - (default) send LM & NTLM responses
Secure channel: Digitally encrypt or sign secure channel data (always) -
disabled
Secure channel: Require strong (Windows 2000 or later) session key -
disabled
4. Contact the third-party SMB server manufacturer if you have a third-party
SMB server, such as DEC Pathworks, Samba or Linux.


--
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Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
http://www.ChicagoTech.net
Networking Solutions, http://www.chicagotech.net/networksolutions.htm
VPN Solutions, http://www.chicagotech.net/vpnsolutions.htm
VPN Process and Error Analysis, http://www.chicagotech.net/VPN%20process.htm
VPN Troubleshooting, http://www.chicagotech.net/vpn.htm
This posting is provided "AS IS" with no warranties.
"anthonyv" <(E-Mail Removed)> wrote in message
news:287DB690-0B33-490E-BF91-(E-Mail Removed)...
> I'm running a windows 2003 mixed mode domain. From a windows 2003 member
> server I am unable to map network drives to any other NT4 or 2000 servers
> EXCEPT for two 2003 servers running AD. Using netuse from a command
> prompt
> the following error occurs:
> "System error 1240 has occurred"
> "The account is not authorized to log in from this station"
> When trying to browse My network places, I'm not able to expand any server
> except for the 2 servers running AD.
> Any one have ideas on why this is happening. Probably a Local Security
> policy setting, not sure which on though. Thanks.