Using iCal with Google Calendars: can view subscribed calendars, but not add to them

Something recently happened to my google calendars causing them to all disappear from Google. Anyway, that mystery remains.

I am currently trying to re set up iCal to sync with Google Calendars and things aren't working quite right.

In iCal, I've done Calendar>Subscribe and entered the URL for that particular Google calendar. This has been completed for the 5 separate Google calendars I have and they show up in the list of subscribed calendars.

However, if I attempt to create a new event, the only calendar choice I have is for the main GMail calendar, not any of the subscribed "sub calendars".

In Preferences>Account, If I select Google and then go to the "delegation"tab, there is a message that states "You can't see delegation settings when this account is offline."

Can anyone offer some advice?

Thanks.