K-news: Can´t setup an Newsletter

I found K-new yesterday, and it seems fit perfect for my need.
The installation worked like a charm and e-mails are send.

But I can´t set up an Newsletter cause if I click on Newsletter I get a blank page. I´m in an multisite environment with an buddypress installation. Before I switched to K-news I had a mailpress installation wich sended most of the mail to the spamfolder. Thats the main reason why I switched.
I´m using Mac Safari and Chrome.
Thanks for any reply.
Cyprus