Creating another customized packager for all incoming request using MUX. My outgoing request works with no issue

Question

I have a jpos implementation that sends and receives iso messages. It first requires sign-on before anything else. As a client, i am able to send request (customized.xml packager) and also receive response successfully with no issue.

However, when the other party sends request to me, the same packager (customized.xml packager) is unable to unpack the request received.

To try to resolve issue with incoming request, i decided to create a new customized packager (customized2.xml) but i noticed all incoming request are still referring to the old packager (customized.xml). How do i handle this or what's the best practise to go about it.

My configurations:

10_mychannel.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <channel-adaptor name="mychannel-channel" logger="Q2">
       <channel class="org.jpos.iso.channel.ASCIIChannel" type="client" connect="yes" logger="Q2" realm="post-channel" packager="org.jpos.iso.packager.GenericPackager">
          <property name="packager-config" value="cfg/customized.xml" />
          <property name="packager-logger" value="Q2" />
          <property name="packager-realm" value="custom-packager" />
          <property name="host" value="14.101.333.111" />
          <property name="port" value="7777" />
          <property name="length-digits" value="6" />
          <property name="connection-timeout" value="30000" />
          <property name="timeout" value="300000" />
       </channel>
       <in>my-channel-send</in>
      <out>my-channel-receive</out>
       <reconnect-delay>10000</reconnect-delay>
       <keep-alive>yes</keep-alive>
    </channel-adaptor>

20_my_mux.xml

    <mux class="org.jpos.q2.iso.QMUX" logger="Q2" name="my-mux">
    <in>my-channel-receive</in>
    <out>my-channel-send</out>
    <ready>my-channel.ready</ready>
    </mux>

21_my_q_beans.xml

    <qbean name='LogonManager' class='com.my.processor.LogonManager' />

50_my_server.xml

    <server class="org.jpos.q2.iso.QServer" logger="Q2" name="xml-server-7777" realm="xml-server-7777">
      <attr name="port" type="java.lang.Integer">7777</attr>
      <channel class="org.jpos.iso.channel.ASCIIChannel" packager="org.jpos.iso.packager.GenericPackager" type="server" logger="Q2" realm="xml-server-7777">
      <property name="packager-config" value="cfg/customized2.xml" />
      <property name="timeout" value="180000"/>
      </channel>
      <request-listener class="com.my.processor.myListener" logger="Q2" realm="incoming-request-listener" />
    </server>

incoming sample request

    public class myListener implements ISORequestListener{

        private static final String FTREQUEST = "1200";
        private static final String REVADVICE = "1420";
        private static final String NETWORKREQ = "1804";

        Log log1;

        @Override
        public boolean process(ISOSource source, ISOMsg m) {
            System.out.println("::::: Waiting :::::");
            log.info("::::: Inside  Listener :::::");
            try {
                String mti = m.getMTI();
                System.out.println("mti ::: " + mti);
                log.info("mti ::: " + mti);
                switch (mti) {
                    case FTREQUEST:
                        log.info("Inside Financial Transaction Request");
                        //implementation here 

                        m.setMTI("1210");
                        m.set(2, m.getString(2));
                        m.set(3, m.getString(3));
                        m.set(4, m.getString(4));
                        m.set(11, m.getString(11));
                        m.set(12, m.getString(12));
                        m.set(39, "100");
                        source.send(m);

                        break;
                    case REVADVICE:
                        log.info("Reversal Advice");
                        break;
                    case NETWORKREQ:
                        log.info("Network Management Request");
                        break;
                }

            } catch (Exception ex) {
                ex.printStackTrace(System.out);
            }
            return true;
        }
    }