Re-direct user to EDIT a particular entity yields "invalid page"

This is what I am trying to do:

on a View of given Entity

when user presses specific button

Rules conditions find the Entity and Button in that entity

and wants to re-direct user to EDIT that particular entity

The Rule is triggered, it does find the proper Entity, and the Action is triggered.

I know this because another 'action' in this rule is to alter the Entity workflow state

The Redirect is triggered too

the parameter to the 'Page redirect' action is:

site:/?q=gr_job/gr_project/entity:id/edit

but what I get is 'invalid page'

what am I doing wrong ??