Preview of Approved Content

Hi,
I’m just following through the latest Webinar for creating a Preview of Approved Content but I get assembly errors for my item.

It seems to be related to the sys_itemfilter parameter.

Our normal preview URLs contain sys_authtype=0 rather than sys_itemfilter=preview.

The error appearing in the log files is
com.percussion.services.filter.PSFilterException: You must specify either the authtype or the item filter name

We’re currently running 6.5.2 which has been upgraded from 5.X so are we running a legacy version of the preview?

Thanks.