error when using kettle operate hive database(CDH4.2) ,cant explore hive tables &

I have successfully connect hive, but I cannot explore the tables in hive through kettle explore database, and also cannot create table through 'SQL' node,
errors like this :

2013/12/20 15:24:14 - SQL - Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask

who can help me? Thanks a lot.