THE ERROR DESCRIPTION IS:
[Microsoft][ODBC SQL Server Driver][SQL Server]Could not allocate new page for database 'MessageStats'. There are no more pages available in file group PRIMARY. Space can be created by dropping objects, adding additional files, or allowing file growth"
This error will occur if using MSDE and the database is at the limit of 2gigs. Either purge data from the database or move to a SQL 2000 server and try upgrading again.