I was found the solution. The problem was that my user in my computer was not an administration user. I read that P2A install grammarhelper file in the administration account, and if the user when is installing the program is a "standard" user, It can't read the grammarhelper file. I was uninstall P2A, change my type of user to "administrator", reinstall P2A and the grammar helper, and speech assistant works fine.