Pre-execute error in simple import/export

I am trying to copy data from a SQL Server 2000 DB to SQL Server 2005 DB using the import/export wizard in SQL Server Management Studio. The two databases are not identical with different table names and different columns but I thought I had set up all the right mappings and had set the 'Enable identity insert' option. When I ran the wizard it errored at the Pre-execute phase. I simplified the wizard down to one table and only as couple of varchar columns and this also errored in the same way. The error report is detailed below.

For reference the SQL2000(ent. edn) DB is on a windows 2000 server and the SQL2005(dev. edn) DB and the management studio are both on my WinXPSP2 workstation.

Could somebody explain why these errors have occured and more importantly how to rectify the problem?

Many thanks,
Michael.

Operation stopped...

- Initializing Data Flow Task (Success)

- Initializing Connections (Success)

- Setting SQL Command (Success)

- Setting Source Connection (Success)

- Setting Destination Connection (Success)

- Validating (Warning)

Messages

Warning 0x80047076: Data Flow Task: The output column "DateAdd" (23) on output "OLE DB Source Output" (11) and component "Source - tccNewsArticles" (1) is not subsequently used in the Data Flow task. Removing this unused output column can increase Data Flow task performance.
(SQL Server Import and Export Wizard)

Warning 0x80047076: Data Flow Task: The output column "DateChg" (26) on output "OLE DB Source Output" (11) and component "Source - tccNewsArticles" (1) is not subsequently used in the Data Flow task. Removing this unused output column can increase Data Flow task performance.
(SQL Server Import and Export Wizard)

... NOTE: I have removed the rest of the warnings as they were the same as above (many of them).

- Pre-execute (Error)

Messages

Error 0xc0202009: Data Flow Task: An OLE DB error has occurred. Error code: 0x80040E21.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E21 Description: "Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.".
(SQL Server Import and Export Wizard)

Error 0xc0202025: Data Flow Task: Cannot create an OLE DB accessor. Verify that the column metadata is valid.
(SQL Server Import and Export Wizard)

Error 0xc004701a: Data Flow Task: component "Destination - Nrs_NewsArticles" (112) failed the pre-execute phase and returned error code 0xC0202025.
(SQL Server Import and Export Wizard)

- Executing (Success)

- Copying to [NereusV2_1].[dbo].[Nrs_NewsArticles] (Stopped)

- Post-execute (Stopped)

- Cleanup (Success)

Messages

Information 0x4004300b: Data Flow Task: "component "Destination - Nrs_NewsArticles" (112)" wrote 0 rows.
(SQL Server Import and Export Wizard)

Michael,

this is most likely a truncation problem. Could you check the sizes of used source and destination columns?

Thanks.