Mower will not move in either dircetion?

Don't know what kind of lawn mower you are talking about. Sounds like your transmission is not engaged. Try this: All the way at the rear you will see a metal panel with a skeleton key-type looking hole (large and round at the top and then it narrows and gets straight at the bottom). There is a rod that comes through the hole, it is spring loaded. Pull the rod through the large round part of the key hole and on the rod you will see along the rod a built in washer-type ring. Make sure the washer-type ring comes through the hole and push it down to the small end of the key hole so it will stop it from going back through the hole. This engages the transmission. It is called the "free wheeling rod." To disengage the transmission, to make it easy to push, you pull out the spring loaded free wheeling rod and lift it up so it will go back through the large round part of the key hole. I would try this first. Mike