Hi Jan,I'm attaching screenshot from webconsole of firefox. It is getting an unauthorised error.Foll is my global network setting line :var globalNetworkCheckSettings={href: 'http://192.168.0.18:8080/ucaldav/user/', hrefLabel: null, crossDomain: null, additionalResources: [], forceReadOnly: null, withCredentials: false, showHeader: true, settingsAccount: true, syncInterval: 60000, timeOut: 30000, lockTimeOut: 10000, delegation: false, backgroundCalendars: [], ignoreAlarms: false }My CalDav-Zap version is 0.9.0.Thanks,Amol.