Trying to get our demographics tracking to work in Analytics. Our account has been active on this particular website for 3 years, so lots of data and in excess of 5k visitors per day from around the world.

However, when we try to track demographics we get this message:

'Some data in this report may have been removed when a threshold was applied'

that message appears for any date range from one month to 2 years, so no data is appearing.

Any ideas?