you'll need to get under there and see whats leaking. more them likely its a line. i used a small hacksaw to cut the old line. mine was the one that runs across the rear sub frame and it was beat so i replaced the whole thing from a clear area to cut and wrench on the compression fittings.

compression fittings work, but renting or owning and flairing the lines and using line nuts and all is the preffered way to change a chunk of line.