Toilets, Sinks, Showers, Tubs and Disposals - Shower drain installation with leak

I am putting the finishing touches on a bathroom remodel and having trouble with the shower drain. I have put in a Kohler shower pan and am using the drain it came with. The "exit" portion of the drain consists of a brass piece with a rubber sleeve on the inside of it. A 4" PVC pipe fits into this and by tightening up another brass piece above the rubber sleeve, the rubber sleeve is folded down over the PVC and a seal is created. Mine leaks! I found I had 2 issues: 1) The PVC pipe was moving and thereby the seal kept breaking. 2) I fixed the movement, but the pipe was coming in at a slight angle (really- it was a small angle!) and thereby a good seal could not be maintained.

My question is this- is there anything else I need to do besides get the pipe in there straight and make sure that is does not move? Do I put plumbers putty in there somewhere? Will some movement be ok? I seems as though it will be difficult to eliminate all movement especially since the shower pan flexes ever so slightly when someone stands in it.

Great site- thanks for the help!!

If I understand your description correctly, the PVC pipe comes up through the middle of the drain, and a rubber ring slides over the end of the pipe. A brass ring is then threaded down over the pipe and is tightened with a flat "wrench", using a screwdriver.
You said "the rubber sleeve is folded down over the PVC and a seal is created". It sounds like you do not have the pipe coming up high enough into the drain. The pipe should be high enough that the rubber ring slides down far enough onto the pipe that the pipe just sticks above the rubber ring. It should still work if the pipe is cocked a couple of degrees or if the pipe moves a little.
Take the seal nut off and pull the rubber seal. Check the rubber seal to make sure that it is not damaged or deformed or cut. If it is, get another one. If you cannot find a new seal, buy a PVC shower assembly. Its rubber seal should be the same, and the whole thing only costs a few dollars. Next, lubricate the rubber seal with some silicone (spray silicone will also work, but not as well). Then reassemble the drain as above, and tighten the seal nut with the wrench.
The flange of the drain should have a bed of plumber's putty between it and the shower floor. The nut underneath needs to be tightened firmly, swueezing out the excess putty. Don't use any other glue or putty on the drain. If you are not sure if you did the plumber'sputty correctly, then take the drain out, clean it and do it again.

Let us know how it comes out.

Fixitron- I am in your debt. You are exactly right- the pvc is not high enough. I see now that the brass ring should tighten down so that the rubber sleeve is pressed up against the SIDE of the PVC. Nice. Everything is intact, and should work fine. I'll give it another whirl with a longer piece of PVC.

You rock, Fixitron!