INVOICE GETTING APPROVED IN LEVEL HIERARCHY WHEN APPROVE BUTTON CLICK MULTIPLE

Hi,

I am trying to extende the standard controller oracle.apps.fnd.wf.worklist.webui.NtfDetailsControlsCO
With a custom controller xxmycomp.oracle.apps.fnd.wf.worklist.webui.XXNtfDetailsControlsCO

I have built the project in my local JDEV and kept the java file under $JAVA_TOP and complied the java file in the same place.
$JAVA_TOP/xxmycomp/oracle/apps/fnd/wf/worklist/webui/XXNtfDetailsControlsCO.class

Also have given full permission (777) to xxmycomp folder under $JAVA_TOP and have done the bounce.

Below is the code  have written.

import oracle.apps.fnd.framework.webui.beans.OAWebBean;
import oracle.apps.fnd.wf.worklist.webui.NtfDetailsControlsCO;