[TYPO3] Show loginform when not logged in

[Marieke Vandamme]

Hello, 

I want my fe users to view a loginform when they are not logged in into my 
intranet.
I added the folowing to the TS Setup of my main template:

page = PAGE
page.typeNum = 0
[usergroup=*]
page.10 < temp.mainTemplate
page.headerData.10 < temp.headTemplate 
[else]
page.10 < styles.content.loginform
[usergroup]

But when the user isn't logged in I just see a blank page. The loginform 
isn't showing. 
What am I doing wrong? Thanks for the help !
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