[Evolution] Mail notification in Ubunut 12.04

[Dianne Reuby <pramclub yahoo co uk>]

Finally done a clean install of Ubuntu 12.04, with Unity. Installed Evo
3.2.3, and have a question.

The mail icon at the top right of the panel only shows Thunderbird - I
know I changed it before so it would look for Evo and notify me of
incoming mail, but can't info on doing this in 12.04. 

Do I simply have to install evolution-notification? I've got the mail
notification plug-in enabled, but I usually have my speakers turned off
so I prefer the new mail icon if possible.

Thanks,
Dianne