Electric Barrier
 

Can someone tell me how I can switch of the electir barrier in level 1...cant find anything

You are supposed to shoot at the switch on the other site of the electric barrier. Look closely.

I just shot at the barrel (I think it was a barrel because it was red) next to the soldier and boom...

You need to shoot small red box on the other side of the barrier (it is highlighted in red)

Ok, so it was not a barrel. I destroyed it too quickly ;-)

dont find the red box
 

can somebody help me to find the red box to close the electrical barrier?
thanks
Enrico

Are we talking about the first level (Trench warfare), right?
The box you need to destroy is right on the other side of the electric barrier, on the ground. Just stand near the barrier and you should see it... It is highlighted in red colour.

To close?
I thought you wanted to open it...