[EventCalendar] Calendar input does not work in Google Calendar/ 30Boxes

[claire circuit]

Hi all

http://www.copsandrobbers.net/?ec3_ical

I have tried changing the output of the file to .ical instead of .ics
but I still get no events when I subscribe in Google Calendar. Can
anyone suggest what is wrong, please?

Also, in 30Boxes, all my events appear six hours early. I assume this
is a server timezone problem, can anyone suggest a fix, please? My
30Boxes and server timezones are both identical. I tried adding this
to line 410 of eventcalendar3.php, but it didn't seem to help,

      echo "BEGIN:VTIMEZONE\r\n";
      echo "TZID:Europe/London\r\n";	
      echo "X-LIC-LOCATION:Europe/London\r\n";	
      echo "BEGIN:DAYLIGHT\r\n";	
      echo "TZOFFSETFROM:+0000\r\n";	
      echo "TZOFFSETTO:+0100\r\n";	
      echo "TZNAME:BST\r\n";	

Thanks
Claire