Hi Di,
You have not made any connections to the One Big Tree on the Hackett side. At the bottom of every profile where you see this weeks connections, each generation up you go on the Hacket side, the numbers get one larger. So no connections can be found for the weekly email other than via your maternal side.
It looks like you've gotten all the way to Ireland, so you may want to look into help from the Ireland project.
Sometimes, taking the time to add the other siblings helps find a source to lead you further back in time, such as a census that lists parents, etc.
And the other benefit, is it makes it so you might find other cousins...
Good hunting!