wxListCtrl - Calling Editor Directly

Hi,

I have a wxListCtrl object which I am trying to call the OpenEditor method directly when adding a new row ... but I recieve this error

Traceback (most recent call last):
  File "BASE.py", line 1123, in OnPopupOne
    self.OpenEditor(0,0)
  File "C:\Python23\Lib\site-packages\wx-2.5.3-msw-ansi\wx\lib\mixins\listctrl.p
y", line 491, in OpenEditor
    x0 = self.col_locs[col]
AttributeError: 'EDITLISTCTRL' object has no attribute 'col_locs'

Is there another way to achieve the same result without having to rewrite the class??

cheers

Ben