calander plugin

[nokia80]

hi all

 I have a question I have in my webmail a calander geinstaleerd, but when I log into the webmail and I go to I get this error calander

E-Mail Address Book, Calendar Settings, Log Loading ...
 Invalid response from
: ./?_task=dummy&_action=plugin.calendar_getJSON&_url=http%3A//www.google.com/calendar/feeds/[email protected]


 Who knows how I get away this error


 thanks