Problems with Multisite

Dear Sirs, try to activate Multisite with Catch Everest Pro. It´s not a problem with the main site I did before, everything works fine http://grenzenlos.ralfhschlotter.com but if i try to activate "Catch Everest Pro" in the Multisite mode for different languages (Subdomains) it shows me only a blank page. If I activate any other Template directly from WP it´s not a problem. Do you have any clue.... how to fix this? Or Do I have to take an other Template?