vCalendar file doesnt work with Outlook

Question

Hi, I'm using vcs file on my website to import the event to outlook (Automatically, no copy and paste) ... some people are complaining that it doesnt work (i dont know if it works or not for the rest of the users ). So I'd like to ask if you see any mistakes in my file:

I use these headers:

header("Content-Type:text/x-vCalendar;");

header("Content-Disposition: inline; filename=calendar.vcs");

and vcs file looks like this:

BEGIN:VCALENDAR
PRODID:-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN
VERSION:1.0
BEGIN:VEVENT
DTSTART:20091020T190000+020000Z
LOCATION;ENCODING=QUOTED-PRINTABLE:website
ORGANIZER:Businessclub
UID:040000008200E00074C5B7101A82E00800000000406B6157AC9CC9010000000000000000100
00000E932C25C854DE84FA854B8E99A8F3398
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:blabla
SUMMARY;ENCODING=QUOTED-PRINTABLE:blabla
PRIORITY:3
END:VEVENT
END:VCALENDAR

thanks a lot