I have a 1997 cherokee sport 4.0 4x4

Im having issues getting the transmission cooler lines

Its the upper line, and im replacing the about 2 feet of hardline and where it meets the soft line it has a plastic clip, Ive tried to use fuel line dis connects on it no work
I tried to push in and pull i tried too, get a plyers and press them in and pull off, Im kinda stumped!!!

XJ gods HELP MEEEEE