Error Querying Data From DB2 Linked Server Via IBMDASQL

I've setup a linked server in SQL 2005 x64 SP2 to retrieve data from OS/400 DB2. When I perform a query on the linked server (select * from openquery(<linkedserver>, "select * from LIB.FILE1'), the following error was returned.

Error:
Msg 7372, Level 16, State 4, Line 1
Cannot get properties from OLE DB provider "IBMDASQL" for linked server "<linkedserver>".I used the same linked server setup procedure on another SQl server with same configuration (but SP1) 6 months ago and it was OK.SQL Server Configuration:SQL 2005 x64 SP2 Windows 2003 SP1iSeries Access V5R3M0 patch SI24723
Linked Server Script:
/****** Object: LinkedServer [OS400] Script Date: 05/02/2007 15:21:24 ******/
EXEC master.dbo.sp_addlinkedserver @server = N'STEMMS1', @srvproduct=N'OS400', @provider=N'IBMDASQL', @datasrc=N'<linkedserver>', @catalog=N'S654803D'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'collation compatible', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'data access', @optvalue=N'true'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'dist', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'pub', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'rpc', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'rpc out', @optvalue=N'true'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'sub', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'connect timeout', @optvalue=N'60'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'collation name', @optvalue=null
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'lazy schema validation', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'query timeout', @optvalue=N'120'
GO
EXEC master.dbo.sp_serveroption @server=N'STEMMS1', @optname=N'use remote collation', @optvalue=N'true'
I've tried searching the Internet for solution but yielded no results. Can anyone help?