Can't set up destination zones: arrows doesn't work!
 

Hi all,
need help asap. Tnx.

I was modifiyng my destination zones, but in a moment, every state has been deleted in that zone and I checked that arrows to move states from right to left column, no more works. When I click, nothing happens and destination zone remains empty. I already tried with three browsers (FF, IE and CH) and also with Safari.

What could happened?

Please help me.
Tnx.