linked server issue on sql 2000 sp4

i am getting below error while running a select statement with linked server to oracle provider with oledb.

Server: Msg 7399, Level 16, State 1, Line 1
OLE DB provider 'OraOLEDB.Oracle' reported an error. 
[OLE/DB provider returned message: ]
OLE DB error trace [OLE/DB Provider 'OraOLEDB.Oracle' IRowset::GetData returned 0x80004005:   ].

while i am able to select top <100 but when i remove top its not working.

sql version is:

Microsoft SQL Server  2000 - 8.00.2039 (Intel X86)   May  3 2005 23:18:38   Copyright (c) 1988-2003 Microsoft Corporation  Standard Edition on Windows NT 5.0 (Build 2195: Service Pack 4) .