Problems with contact form 7

[AMPARILLOO]

Hello, I have problems with the plugin Contact Form 7.
My english its not very good, i hope that you can understand me.

In none of the forms created with contact form 7 gives error messages, for example, in a form with several required fields when I press send unfilled required fields should warning that should fill all required fields a message appear before submit the form. Another example is that they must accept the terms and conditions, if I press send us e without accepting error should appear explaining that in order to submit the form must be accepted before the terms and conditions,the plugin does not show any error message, the only message appears is “message sent successfully”
Please, can you help me with this?

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