Problem Contact Form

I have worked in the localhost without problem, but when uploading to the server problems appear, I have a big problem with Contact Form 7 when I deactivate everything works fine, but at the time of activation it does not load the image library, visual content editor and others .. I create a conflict! What I can do?

Also, it does not let me activate the Easy Peasy MailChimp Ajax Form plugin, an error appears: Parse error: syntax error, unexpected T_STRING in / home2 / comilon1 / public_html / wp-content / plugins / easy-peasy-mailchimp-ajax-form / includes /MailChimp.php on line 3

Please help