I've got a header, after which I want to insert

* Header
  :PROPERTIES:
  :CUSTOM_ID: [2013-03-15 Fri 11:22]
  :END:

I've tried C-c C-x d and C-u M-x org-insert-drawer. Sometimes C-c C-x d works (offering only [RESULTS] which creates empty :: ... :END:), sometime it does nothing. C-u M-x org-insert-drawer sometimes offers me choices, sometimes doesn't telling me I should use C-c C-x d. Once I do get

  :PROPERTIES:
 
  :END:

C-c C-x p offers me choices (I choose :CUSTOM_ID:) and seems to work properly, but again, sometimes does nothing after affirming prompting,

What am I doing wrong. I simply want to have a timestamp property for each header. Can anyone advise me how to create this :PROPERTIES: insertion behavior consistently?

LB