Hi Felipe, To say "I am not agree" is grammatically wrong. The correct form is "I disagree" or "I don't agree".

Either, 'I do not agree with (someone) on (something). or 'I disagree with (someone) on (something). NEVER I AM ;) Hope all goes well.

Thanks guys

Either "I do not agree." or "I disagree." If you simple say, "I disagree" be prepared for the other person to ask you why you disagree.