vCalendar - Send to a shared calendar

I have searched and searched.
I can create a web page that will allow me to add an Event to my Outlook
Calendar, but now I need it to add to a shared calendar or at least a
different calendar.
When I try:
X-WR-CALNAME:IT Department

It creates a new calendar and inserts the event. If I try to add another
event, it creates yet another calendar...IT Department(1), etc....

Is there a way to let vCalendar know which calendar to place the event in??

TIA,
Carlis Burns