Eagle Spice

Hai All,
I am stuck up with a problem, rather, an SQL Exception.Anyone helping out me is appreciated.
I fetch some values from Dbase using Stored Procedures which I call thro'my EJBean.
I have declared Cursors in my procedures which actually contains the SQL Queries.
I am very much successful in getting the values .
But,Once I refresh the page which contains the values,they get disappeared and the exception thrown is
java.sql.SQLException : Ref Cursor is Invalid
Please clear off my problem !!!
Thanks in Advance