I solved the problem but I spent all the morning to solve it. The problem was that a friend set me a script where the keys 1, 2 and 3 other functions have. So I couldn't execute the smooth mesh preview since it uses the same keys, what a stupid mistake...
In case somebody else is having problems like these, all you have to do is delete the files under:
Documents\maya\2008\prefs
Like: commandFieldContentSaved.mel, menuSetPrefs.mel and so on. In my case was the file userHotkeys.mel.
I hope it helps someone else... ![]()