Cannot customize requester part of the default request templ

Hi,

I want to customize the requester part of the Default Request Template - more specifically I want to remove the Priority drop-down box, so that it is only available to technicians.

But I am not able to

When I go to "Admin -> Request Templates -> Default Request" I get to the Technician tab. Here I can move objects around, remove them, add other etc.

But when I click the Requester tab, is says "In this view you can do only re-arrange the fields" - and that is exactly my problem. I can re-arrange yes, but I want to delete a field, and I simply cannot. I have been able to do this earlier, so why is it suddenly not working?

I hope someone can help,
Rasmus