I'm having problems with Mtext command, this is the problem, when I pick a paragraph to change the text, this turn it automaticaly 90�, may be is a common thing, but I can't find the reason, I will appreciate any help.

Check the [VAR]MTEXTFIXED[/VAR] variable - see:
http://www.cadforum.cz/cadforum_en/qaID.asp?tip=4886

here's an idea, try plugging your keyboard into the computer!