LP line from regulator to under camper cut

I gave up on this. I did find a hydraulic company that could make the hose for me, they asked I take off the old one and bring it in...fair enough. I spent over an hour trying to break loose the male end that was in an aluminum junction box. I hooked up the tanks and checked the area that I hit with the wire brush and it's not deep enough to leak. What the heck is going on with that connection? They have some red "Schmutz" to seal the connection but I'd assume that's not permanent. The hose didn't budge no matter what I did. I'm going to have to replace it some day but I think I'll have it done at the dealer (which is something that I usually don't do).

Thanks a lot for the feedback!

Joe