The description for Event ID (34) in Source (Oracle) cannot be found

I have an apparently common issue but didn't find a solution.
We have Oracle DB servers that write audit trail from DB to Windows event log (event id 34).
The servers with 2003 x86 and Oracle 9.2 record the message correctly.
The new servers run 2003 x64 with Oracle 11g and record the event log but with an initial error:

The description for Event ID ( 34 ) in Source ( Oracle.two ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: LENGTH : '140' ACTION :[7] 'CONNECT' DATABASE USER:[3] 'SYS' PRIVILEGE :[7] 'SYSOPER' CLIENT USER:[5] 'username' CLIENT TERMINAL:[7] 'servername' STATUS:[1] '0'

The message content comes anyway in the bottom but the first part prevents our Audit Trail server to read the event log correctly.
Is there any file that have to be given to Windows in order to interpret the message correctly?
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see the parameter AUDIT_TRAIL
If it is set to OS try to set to db or true
QUIPUGmbHAuthor Commented:
db admin has already tried this days ago. did not help
QUIPUGmbHAuthor Commented:
another thing that should NOT appear according to Oracle documentation, note 99137.1 is the square bracket [] after each parameter.
In fact in the event log of servers running x32 and Oracle 9 that does not appear.
Can anybody confirm that?
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QUIPUGmbHAuthor Commented:
first problem fresh fixed:
it was about a registry key which was still pointing to an old dll of Oracle 10:
Wer hat den Datenbak installiert?
Question PAQ'd, 500 points refunded, and stored in the solution database.

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