Google Calendar option missing from "Add a Calendar" dialog

I no longer have the option to select a Google Calendar to overlay on my Notes Calendar.

Has this option been removed with 8.5.1 or do I need to enable something / set a policy / ???

The options I have are:

Notes user’s calendar

Notes Teamroom calendar

Notes application calendar

iCalendar feed.

Subject: Can you check if the google plugin is installed in your client

under C:\Program Files\IBM\Lotus\Notes\framework\shared\eclipse\plugins\ called

com.google.gdata.calendar

This is supported in 851.

If it doesnt exist try reinstalling.