Can't Change the "Private Messages" Picture in the Nav Bar

This is my site - Football Fanatiics Worldwide

I can't change the Pictures for PM's .

It will let me create new Nav bar Icons, and it will let me change pictures for - Home/Calander/Faq etc.

but the PM message it keeps telling me - "You must provide a menu Name" when I try to change the picture

but the funny thing is the menu name is filled in with the default menu name an it wont let me change it.

Help Please.

That feature doesn't work

to change it follow the following steps.
1) go to display
2) go to pics management
3) click simple
4) there should be the private message image click it
5) change to what your want
6) save

Hope this helps

thanx man ill try it out