how is the custom shipping charge triggered? If it is not showing on the pp_confirm page, I would have to guess that whatever the trigger is set to is not being met.
Can you send a screen shots that shows how the shipping charge has been created?
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.