Just going through the tutorials and starting to do some of my own simple sketches. I have created a simple assemby of a lower plate with a hole in it. I then created a created/insert/new part. I designed a guide pin to go into the hole. When I try to mate the pin into the hole (mating the bottom surface of the pin to the bottom surface of the plate) it goes into for only a second and then snaps up to the top surface of the plate. For the life of my I can't figure out why the pin wont go into the bottom of the home. Thanks so much for the help.