Customization of UWL screen contains Reject,approve,Back buttons.

hi Experts,

I want to remove "back" button which comes on screen after we click"Forward" button on main UWL screen and it displays adobe forms,below which there are three buttons.but i dont know how to proceed with this.I checked with all par files,like bc.uwl,uwl.ui etc but didnt get any clue to solve this.

Please if anybody can guide me on this,do reply,

Thanks,

Nutan