[En-Nut-Discussion] external irq, wiki

[Klaus Kloos]

Hello

Im searching for an example of using an external irq using ethernut and SAM7x.
On the page http://www.ethernut.de/nutwiki/Nut/OS_Examples there is a link to 'Digital Input Interrupt' which sounds very good, but it is red and using it gives an 
'The action you have requested is limited to users in the group user.'. 

How can I come across this?
Any other hint for an example?

Greetings Klaus