The new V-lite does not have the pushfit inside the aquadapter. There should be a little plastic fitting that has a barb, attach this to your pole hose and use the supplied o clip to secure it, then fit the little rubber o ring onto the plastic fitting. This then attaches inside the aquadapter via bayonet fit.
the little plastic fitting should look like this
All this would have been in the the supplied instructions if you had read them