Dynamic Distribution Group - All groups in Global Address List

Hi

I've finally got around to extending my on site schema to give me the attributes needed by DirSync so that I can take advantage of Dynamic Distribution Groups.

I have created 2 dynamic distribution groups and these both appear in the Global Address List correctly. However, if I go to the All Groups address list, the list is blank.

Am I missing something obvious here in order to make the dynamic groups display in the All Groups list?

Thanks