[SOGo] [Java] ical4j-connector can't find any resources

[Ruben Felgenhauer]

Hello,

I am currently trying to access my university's SOGo with ical4j-connector.
This is the code that I tried to access my personal calendars with:
http://pastebin.com/CdsGVYzT
These are the results of selected methods of CalDavCalendarStore ("store"):
http://pastebin.com/Cdm400RT
I can clearly see that ical4j-connector knows it's connected to SOGo, it
also finds my calendar home set at "/SOGo/dav/<username>/Calendar/", but
it still can't find any resources, calendar collections, etc...

I have multiple calendars which can be accessed via
"https://sogo.<host>.de/SOGo/dav/<username>/Calendar/<id>/", which
Lightning / SOGo Connector and DavDroid can perfectly work with.

Am I using the library somehow wrong? Too bad that the library is quite
poorly documented (apart from the Javadoc).
Or may this be an configuration issue on the SOGo side?

Half-OT:
The two things that I need to be able to do are deleting all
appointments from one certain month and importing an ICS file
(both with a calendar which is accessible for example via a known link).
Is ical4j-connector even the most suitable lib for the job?

Best regards,
Ruben