custom property setter not fired on commit

Hi.
I'm doing a new plugin for my widget...
It has a property editable with a TreeView, like "columns" on
GtkListStore object.
In my callback function on "edited" signal I have the following code

  g_value_init (&value, MY_TYPE_COLUMN_FORMAT_LIST);
  g_value_take_boxed (&value, colfmt);
  glade_editor_property_commit (eprop, &value);

but my custom property setter is not fired. If I use
glade_property_set it is correctly called but I miss the undo/redo
stack.
Can I have some help?

Thanks!
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