Block limit !

hi all

my problem :

I create a laser for limit the map ( multiplayer map )! when we going behind this laser we died ! It's ok, this is what i want last time !

but now, much players go to the laser for die, and the score in team match go down ! you see?

For example, in your server SG snipers, when we go to the spots , we are blocked !
i want to have the same for my laser!

This is possible to give me an idea for block it ?
this will be very very nice !

Mehdness