Hmmm.
Cant really see anything wrong in there either.

Does proc_kill(3); actually work?
Try splitting it into proc_kill(1); AND a proc_kill(2);

Besides that, try putting a few beep(); or error("xxx"); lines
into Level_A to see if it is getting executed AT ALL.

I tried but no,no beep ,but it´s curios the function starts when i press SPACE what is binded to a Scan function.
I don´t know what makes this error happen.

So I think I solved the Mystery
First a Pic of the situation


Like I said nothing happend when player hits the Blue Eventhorizon but now I changed this Entity with a Simple Block
Model and now it works!!!
I don´t know what is wrong with the previous Entity because it worked in the past maybe there is something new in collision detection.So I have to create some more variations of this modell to find one that looks good and works well.
But anyway I want to thank you guys for your time and help.
It´s a great Community!

Interesting. And odd.

Please keep us posted if you find WHY the old model doesnt work.
Your information may be able to help others, it may have done so already.