I use BAUER Kompressoren Junior II. I got a problem during using the air compressor to refill the air cylinders. As per the instruction manual, international filling connector connected to the air bottle, opened the cylinder valve then pressure gauge showing present pressure of the bottle. Once I started the compressor air is not filling to cylinder, when removed the connecter from the bottle pressure gauge still showing the beginning pressure of the bottle without dropping. While running the machine I felt air leaking on top of the safety valve of filter cartridge. Advise me