shower drainage problems!!

: I have a cabin with a newly installed shower that is not : draining very well. The drain pipe was laid out with the : proper drop. However, it is not vented, nor is anything : in my cabin. Is this my problem? The shower has not : been used long enough to be clogged. Can anyone : help with this as I am a novice plumber. Im sick : of standing in drain water. It does eventually : drain out though, with a log of gurgling. : Any help would be greatly appreciated!! Q.What is a vent, and what does it do for the plumbing system?A. If you look on your roof, you will see pipes sticking out of the roof aprox 12 high. �For every pipe that goes down, one needs to go up. �The obvious reason we have vents is that sewer gases need to be vented outside of the dwelling. �Not so obvious is what happens if they are not included in the waste and vent design. �Imagine yourself at McDonalds drinking a soda from a straw. �If you put your thumb over the straw, you can pull liquid up from the cup. Remove the thumb and see it instantly drain out! �When liquid goes down a pipe, air needs to follow it. �Without the vent pipe, the draining liquid will try to suck air through the P-traps on the plumbing fixtures,(tub, sink, etc.) glurp, glurp! �If it manages to do so, you may know it from the smell coming from the now dry seal on the P-trap. Without vents, draining one fixture may cause another fixture in the house to back up, yuck! A waste and vent system should keep sewer gas out of the dwelling and drain every fixture well. � Regards, Terry Love