Error Message MSExchangeDSAccess oon exchange server 2003 SP-2

Hi All,

We have problem when sending & receiving mail to only one organizational group if we sending to others group we don’t have this problem, so the message always stuck on “Message Awaiting Directory Lookup”.
When I check on event viewer I got this error message:

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Event Type: Error
Event Source: MSExchangeDSAccess
Event Category: LDAP
Event ID: 2394
Date: 17/09/2007
Time: 10:58:19
User: N/A
Computer: PSATPLXM01
Description:
Process WMIPRVSE.EXE -EMBEDDING (PID=2320). An LDAP search call returned a referral – Server=psatpl06.porsea.lcl Error code=8004090a. Base DN=, Filter=(objectclass=*), Scope=0.

For more information, click http://www.microsoft.com/contentredirect.asp.

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I also checked with netdiag, dnslint and dcdiag there is no problem with that (all tool succes without any error message report)

Please help, I appreciated all comments for this
problem