Here is a simple example of such a form -
One can then click on the "running man" icon to test the form.
Looks good - if yours doesn't render then check/set the following -
Make sure you set the above to your fully qualified machine name.
make sure this is in your etc/hosts.
Also check the listen address / front end host setting for your WLS server via the WLS console.
This should also be set to your fully qualified machine name
Use your fully qualified machine name when starting process composer in your browser.