Java Database Connectivity (JDBC)

Hi,
I am getting Uncategorized SQL exception for my code:
The error is:
org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [select distinct table_desc from TABLE order by table_desc where month = ? and year = ? ]; SQL state [HY000]; error code [857]; [NCR][Teradata JDBC Driver]:PreparedStatement.setObject: Unsupported Object java.util.Hashtable ; nested exception is java.sql.SQLException: [NCR][Teradata JDBC Driver]:*PreparedStatement.setObject: Unsupported Object java.util.Hashtable*

Here is the code

public class ABC {   
 
 private static final String MYDATE = "  month = ?  and year = ? ";
 
public List<String> getTables(Report report) {
		List<String> tables =  new ArrayList<String>();
 
		JdbcTemplate template = new JdbcTemplate( dataSource );		
		Object sqlParameters[] = null;
		sqlParameters = new Object[]{ getMonthAndYear( report ) };
 
		String sql = "select distinct table_description from TABLE " +
		" order by table_description where ";
 
		tables= template.queryForList(sql + MYDATE,sqlParameters);		//the error is throwing on this line	
		
		return( tables);
	}
private Map<Integer, Integer> getMonthAndYear( Report report ) {
 
      Calendar today = Calendar.getInstance();
 
      Map<Integer, Integer> monthYear = new Hashtable<Integer, Integer>();      
 
      monthYear.put( Calendar.MONTH, today.get( Calendar.MONTH ) );
      monthYear.put( Calendar.YEAR, today.get( Calendar.YEAR ) );         
       
        System.out.println("monthYear :"+monthYear);//this prints monthYear :{2=10, 1=2008}
        return( monthYear );
}
}

Can anybody help me solve it? It's something to do with the parameters I am getting back...(my paramater is a map)
I will appreciate your help,

Thanks in advance...