make an ical event with AppleScript

Hi,

Sorry for my english because I'm french and I speak english just a little.

My question is the following :

I want to write a script with AppleScript to create an event in iCal and I want to specify the status Free/Busy.

My script is :

tell application "iCal"

tell calendar "My Calendar"

set theCurrentDate to current date

make new event at end with properties {description:"Event Description",

summary:"My rendez-vous", location:"Paris", start date:theCurrentDate,

end date:theCurrentDate + 120 * minutes}

end tell

end tell

Now I want to specify the status "Busy" to this event. I find on the internet the command FBType but I don't know how it works.

What is the command line to do this ?

Would you like to help me ?

Thank you for your help