The installation of this extension is quiet classic, but one thing you shouldn't forget is to include the static files.
if you don't the error "wrong table" is displayed in Fe. If the date is not entered, the default date is used, January 1, 1970.
In addition you should check the configuration of your users that the news is not hidden by default (see this topic)
There is nothing special about this extension, manage your contributors with the rights of access.