Passing parameter to date function in DB2

[Parameswaran Thangavel]

HI all
I need to find the difference between the date the user enters and the current date. and i used the below query to find it out.

select days(current date) - days (date( ? ))  from sysibm.sysdummy1

i am using the prepared statement to pass the values to this query, using the
prepStmtOj.setObject(1,"2006-01-01");

i even tried hard coding the values but still i am getting the error.

Have anyone know what the reason. The format of the date i am passing in is valid one. i seen some examples using above date format.

com.ibm.db2.jcc.a.SqlException: DB2 SQL error: SQLCODE: -418, SQLSTATE: 42610, SQLERRMC: null
        at com.ibm.db2.jcc.a.co.e(co.java:1361)
        at com.ibm.db2.jcc.a.co.a(co.java:984)
        at com.ibm.db2.jcc.b.bd.g(bd.java:121)
        at com.ibm.db2.jcc.b.bd.a(bd.java:42)
        at com.ibm.db2.jcc.b.r.a(r.java:31)
        at com.ibm.db2.jcc.b.bp.g(bp.java:103)
        at com.ibm.db2.jcc.a.co.g(co.java:968)
        at com.ibm.db2.jcc.a.cp.T(cp.java:1378)
        at com.ibm.db2.jcc.a.cp.Y(cp.java:1491)
        at com.ibm.db2.jcc.a.cp.setObject(cp.java:833)
        at jrun.sql.JRunPreparedStatement.setObject(JRunPreparedStatement.java:2
23)