使用java将参数从flex传递到数据库

I am facing one problem when am trying to insert values from flex(frontend) to database(backend).No problem in blazeds connection.I think problem is with java code.Anyway am pasting both java and flex code.Please let me know how to insert values into database.I am not well in java.So i tried a lot to solve this issue.I am facing one problem when am trying to inser