if we are talking about the pmr07 then i believe it has no hoses...? usually when a reg starts leaking while adjusting it is because an oring inside the reg was weak and when turned breaks. check all your orings in the reg if it coming from between the frame and the reg, although really just the one you see when you unscrew it would be the only probable culprit.
But there's no sense crying over every mistake
You just keep on trying 'til you run out of cake
And the science gets done and we make a neat gun
for the people who are still alive