Hi Jan,
thx for reply.
The installation is only network intern, i can't give u an demo.
But there is some interesting. I found the var globalSubscribedCalendars at the bottom of the config.js
After configure this, and test it, Jquery put an ?_=timestamp (cache querystring) at the end of the calendar file (ics file), SarbeDAV says 404
After i set in webdav_protocol.js ( line 1562 ) the cache var to "true", your CalDavZAP shows me all events.