Security settings blocking LDAP responses??

We have a VDS server running on a Solaris box that sends LDAP queries to 
a Win2k domain controller on port 389. The domain controller is 
responding to the LDAP request with the following error message:

"The server requires binds to turn on integrity checking if SSL\TLS are 
not already active on the connection, data 0, v893"

I have disabled, or set to "not defined", the following security 
settings, and run the command "secedit /refreshpolicy machine_policy 
/enforce" after making the changes:

Synchronize directory service data
Network security: LDAP client signing requirements
Domain controller: LDAP server signing requirements

Any idea what other possible security setting could be causing a hangup 
here? Or maybe something besides a security setting?

PG

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