I am having problems installing and/or running Backupbuddy.

I have installed Backupbuddy on my multisite.
I have added this code to the wp-config.php.
define( 'PB_BACKUPBUDDY_MULTISITE_EXPERIMENT', true );
It does not show in the pages, but i see it in networkadmin panel.
On the mainpage there it says Bacupbuddy bla bla bla... And click here to create a backup.. When i click, i just get that i dont have permission.
Can you please help me? I have already granted support access.