[LVL ED] Please, I need your help.

[Rassagai]

I'm an spanish begginer trying to work with LevelEditor. My problem is that my editions in the LevelEditor only works during a few minutes. For example, I put a readable note with a custom text in my custom story and the text only appears more or less 3 or 4 times when I open it. Then, the text disappears!! And my two other problems are that I can't put an Area who activates a custom ambient sound, and that I can't (or I don't know how to) put a custom entity.