Why can't I add Google Calendar to my passport?

Hi :
I am trying to add google calendar to my passport , i have already added my gmail account , there is no option there to include the calendar (Only Mail) , I have also tried the CalDav route , also no luck , i keep getting an error msg about my login (i followed the instructions posted here and on Blackberry knowledge base )
I am running 10.3.0.908
Thanks in advance

Odd behavior. When you add the account through settings, it should add email, contacts and calendar by default, unless you start in advanced. Delete the account and start over, simply adding a general email account.