Connecting SQL Server 2K to Oracle

I am attempting to connect MS SQL Server 2K to an Oracle 9i instance using Microsoft's linked server feature. Both databases are on the same server, a Windows 2K Server. Per Microsoft's documentation, I am to install Oracle Client tools and SQL*Net, and then create a SQL*Net alias to my Oracle instance. Below is the tnsnames.ora and sqlnet.ora files containing the required alias. I create the linked server in MS SQL Server, and specify the below alias as the datasource. For the linked server login I specify the 'SA' account and an ID that I have set up in Oracle along with the password. When I attempt to connect via MS Enterprise Manager, I receive an error that reads "Error 7399: OLE DB Provider 'MSDAORA' reported an error." I can connect to both databases independently, but cannot figure out why the linked server from SQL Server to Oracle is not working. Any help at all on this will be appreciated. If anyone knows of documentation that addresses this will also be appreciated.
The file contents are as follows:
tnsnames.ora
# Filename......: tnsnames.ora
# Name..........: LOCAL_REGION.world
# Date..........: 19-JUN-97 08:39:28
orcl.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.world)
(PROTOCOL = TCP)
(Host = <Host>)
(Port = 1521)
(CONNECT_DATA =
(SID = orcl)
# Filename......: sqlnet.ora
# Date..........: 12-JAN-99 08:59:28
AUTOMATIC_IPC = OFF
TRACE_LEVEL_CLIENT = OFF
SQLNET.EXPIRE_TIME = 0
NAMES.DEFAULT_DOMAIN = world
NAME.DEFAULT_ZONE = world

Hi. I cannot help You, but shares the problem. Have You figured out a solution to this problem?
If You have, could You please send me "the solution".
Thanx
/Bjarup

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