Floating Text disappears?

I've got a problem- if i create a floating text, it disappears after some time. Well, i don't know if this is meant to be as it is, but the even more amazing problem is, when i make a trigger that, let's say, creates a floating text at the same point every 15 seconds, the floating text also disappears!

I have this problem in every map of mine, and hell, THIS SHOULD NOT HAPPEN!

So what can be the reason of this and how can it be solved?

Floating text disappears on its own after a couple of minutes. Prevent this by first destroying the floating text then recreating it. Note that you have to destroy the previous floating text.

Okay, that sounds reasonable. Thx at first, you may helped me with one of my biggest problems