iCal does not update events in FM

[pfroelicher]

Hi there, 

I run ZULU 2,110 and fms 15. If I change an event in iCal i get an 

O servidor respondeu com
“500”
a operação CalDAVWriteEntityQueueableOperation.

Error. 

Also my server logs are full of 

SECURITY: Client "ReadOnly [127.0.0.1]" authentication failed on database "ZuluSampleData.fmp12" using "ReadOnly [fmxml]".

messages. (since years...hehe). 

What shall I do? 

Yours

Pierre