OS X Server 5.0.4 with El Capitan

Hi to all,

i hope you can undersatnd my english.

I've already update my os to el capitan. Before i do this i controlled the compatibility of the os x server 5.0.4 in the app store.

After the update the icon of os x server in the dock is a crossed symbol, like an app that doesn't work with the actual osx ...who knows what this means?

The app starts on click and i can change all settings. But i can receive the server with my clients. The alert tolds me that the ip or the server name are wrong.

I've controlled all settings, but it don't work...what is the mistake i do?

thats for your help!