Custom Database(db2) Integration Error

hi all,

when I use wildfire to integrate with my user table,which is use db2 database, and use its user which is in the db2 database to login in wildfire system,it will throw exceptions as follows: IBMJDBC Driver CLI0618E User ID and/or Password is incorrect. SQLSTATE=28000

but when i use mysql database, it can run normally,why? could someone help me? thank you very much!

my part config is as follows, other is the same:

<!mysql,run normally>