Problem with executing Distributed Transactions on Linked Server

I have a Linked Server i.e. my SQL Server 2000 is Linked to the Oracle
Database.
The Link is perfect and dont have any problems in accessing the data
from ORACLE. The only problem i am facing is when i am trying
to initiate a Distributed transaction. A simple Insert Query is
working fine but when i try to perform the same through a Stored
Procedure having the Begin Transaction i am getting the error
mentioned below.
Server: Msg 7391, Level 16, State 1, Procedure InsertGFSTemp, Line 12
The operation could not be performed because the OLE DB provider
'MSDAORA' was unable to begin a distributed transaction.
OLE DB error trace [OLE/DB Provider 'MSDAORA'
ITransactionJoin::JoinTransaction returned 0x8004d01b].
I have tried all the help available and have all the supported
softwares installed as well on the SQL Server machine. Still facing
this problem.
If anybody could help me with the same.Raja,
That error code you are getting - " 0x8004d01b" translates into - "The
Transaction Manager is not available". I think that seems to be the
problem. What are the OS of the boxes involved?
Thanks,
Vikram Jayaram
Microsoft, SQL Server
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