Game bug, speeding up sprite

I've been learning flash for about 2 weeks now and I am currently making a game.  I have created wall collision and detection for the walls and enemies and I just patched the last few bugs of the core program so I can start adding gameplay elements but there is one really important bug that I have no idea on how to fix everytime you lose or win the and restart, the player sprite speeds up and it multiplies its speed every time it happens. anybody have any ideas on why this may be?

too much source code so here's the fla:

http://www.mediafire.com/download/dbgtlkhd6pvq4w6/collisionwallgame.fla