Problem with DTC on Win2K3 server and cluster

I can't get DTC to work on any of my Wondows 2k3 servers. when I run a
simple select statement with a begin transaction block I get the
following error:
Server: Msg 7391, Level 16, State 1, Line 2
The operation could not be performed because the OLE DB provider
'SQLOLEDB' was unable to begin a distributed transaction.
[OLE/DB provider returned message: New transaction cannot enlist in
the specified transaction coordinator. ]
OLE DB error trace [OLE/DB Provider 'SQLOLEDB'
ITransactionJoin::JoinTransaction returned 0x8004d00a].
Any ideas?I have the same problem, pls let me know if you ever get a resolution
for this.
Thanks
KP
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