make sure the snares are sitting in the snare bed and that the shell didn't get turned at all.
also, the snares should be just touching the bearing edge.....there's no need to tighten down the knobs on the top of the strainer so that the guts angle downward if you're looking at it from the snare side. If that's the case, the guts are going to be too tight. You can test the contact by slightly tapping the guts with your finger where they meet the edge. If you can feel them moving down, then they aren't actually in contact with the edge. Gradually lowere them down until they are actually touching and you can not feel any movement.