sorting diary entries

[Graham Smith]

using Emacs 22.0.92.1 on Winxp I am trying to sort diary entries using

(add-hook 'list-diary-entries-hook 'sort-diary-entries t)

as suggested on the diary wiki. 

However, it is making no difference.

Does it depend on some other code. 
Just in case it matters I also have a line added to .emacs to
specify european date format.

Can anyone suggest something I could try?

Many thanks,

BTW sorry about the font, Gmail seems to have decided
to misbehave and I can't fix it.