How to customize the dummy form field in response of /my.policy

Hi,

I've created a simple Access Policy Profile for one.mycompany.com,

Start -> fallback -> access-granted

When another web page on another.mycompany.com tries to post a form (consisting of 4 fields) to an URL on one.mycompany.com As usual, such a post is redirected to /my.policy whose response looks like:

Note: Your browser does not support JavaScript, Press Continue to proceed... 

As you can see, /my.policy returned dummy form field and all the 4 form fields from my original form post are lost. Can someone shed the light on how to configure my simplest Access Policy Profile such that my.policy will return all form fields from the original post request in its own default login form in response?

Thanks in advance!