Esmi I did all that you said, and still doesn´t work, I don´t know what can I do! I searched for someone else with the same problem and I didn´t find nothing.
Paul I tried what you say but it doesn´t work, the virtual editor is still hidden in the left.
Esmi I have tried all except switching the theme, I’ll try when I´ll make a backup.This problem appeared when I made the update to WordPress 3.4.1 I don´t know if it’s possible return to a previous version.