To specify a handler for JCL requests

On the Home page of Enterprise Server Administration, look at the Objects column for the enterprise server that you want to start a handler for. One entry there shows the number of handlers available in that enterprise server – it is at least 2, since the Web Services and J2EE handlers are there by default. Click Details next to this Handlers entry.
On the page that appears, click Add.
On the Add Handler page that appears, type MFRHJCL in Module Name, leave Module Path and Configuration Information blank, and type "Handles JCL requests" in Description.
Click Add at the bottom of the page. The list on the Handlers page now includes MFRHJCL.
Click Home on the menu at the left. The Objects column for the server now shows one more handler than before.
Stop the enterprise server.
Restart the enterprise server.
This has the effect of starting the listener.

Note: You need to specify a handler for JCL requests only if you want to use an existing enterprise server for handling JCL jobs that does not already have this handler defined. Any new MSS-enabled servers you create will automatically have this request handler defined.