When i had the same issue i turned off the filter. With the connector attached i poured tank water down the intake to get as much air out of the pipework as i could. Connect it back up, open the valve and it should start pulling water through and fill the canister via syphon action. Turn the filter on and it should start running water through the system. Trick is to get the air out of the pipework so the syphon action will work.
Best bet though is to make sure the tank is fully filled as this is the best chance of the primer handle operating as intended. The less height it has the draw the more likely it is work correctly.
Not sure if you know how the 06 range operates, but I think the input is purely gravity and syphon action and the impeller returns water to the tank. Correct me if im wrong.
I found a few youtube videos on the issue and how to get round it, and someone who knows way more than me said the primer not working properly is a common issue with 06 range.
Hope this helps, im not great at explaining things. There is a youtube video on a channel called Nate Cravillion that shows pretty much what i did but with a lot less mess and swearing.