Laminate floor tongue and grooves do not snap together
I am laying glueless laminate flooring in my den on top of polyethylene sheeting as a vapor barrier. I was doing well with the project until I tried to get the tongue and groove to snap together. I have been able to get the planks connected but I do not feel or hear the snap that should occur when the tongue and groove come together correctly. Without them snapping together to create a firm grip, they eventually come loose as I work on the far end of the row. I was able to get the first two boards in row 1 and 2 to snap together because since they are the first to go down, I could actually lift them to create enough space to have them snap. However, on all other connections, I push the boards down against the floor and they will come together but they do not snap together. I am not doing something right. Any help will be greatly appreciated.