blob setBinaryStream

Do you need to create a transaction to set blobs?
        con.setAutoCommit(false);
        FileInputStream fis = new FileInputStream(file);
        PreparedStatement ps = con.prepareStatement("update= 
userpreferences set image='?' and time=? where user='?'");
        Logger.log("Setting Binary Stream");
        ps.setBinaryStream(1, fis, length);
        ps.setInt(2, (int)new java.util.Date().getTime());
        ps.setString(3, user);
        ps.executeUpdate();
        ps.close();
        fis.close();
        con.commit();
        con.setAutoCommit(true) ;

When Set Binarystream calls the setInt method, it throws a 
 SQLExceptionParameter index out of range.
Does anyone know what this could be?