I had this problem too a few days ago. Try to compile the map as "BSP Map" ( not simple map ). If should work now, but dont ask why.

And i see a problem in your jumping script. Try to jump against a wall. Player stops falling down right ?

Acknex umgibt uns...zwischen Dir, mir, dem Stein dort...
"Hey Griswold ... where u gonna put a tree that big ?"
1998 i married my loved wife ... Sheeva from Mortal Kombat, not Evil-Lyn as might have been expected
rayp.flags |= UNTOUCHABLE;