Multiple issues with template

Hi,
I am facing main three issues with the template, here they are:

1. On home page, the home button do not reflect current page selected class like (class="current"), while other pages do
   Live URL: http://evolusys.com/

2. All pages do not show the 'slider' (I am using Revolution Slider). All the CSS & js files are linked though. But when you refresh the pages, the slider suddenly appears but not at the first attempt, especially Firefox browser. On Chrome, only Home page and contact us page show the slider/header images but not others. This is really weird. I AM ATTACHING PICTURES FOR YOUR REFERENCE
   Live URL: http://evolusys.com/

3. Contact form not working. My server supports PHP Mailer function. It's Running version: 5.3.6 It is giving error while validating reCAPTCHA.
   I AM ATTACHING PICTURE (ERROR)
   Live URL: http://evolusys.com/contact-evolusys.html

Please support me as I am on a tight deadline. Thank you.

Hi there,
Contact form not working. My server supports PHP Mailer function. It’s Running version: 5.3.6 It is giving error while validating reCAPTCHA.
I AM ATTACHING PICTURE (ERROR)
Live URL: http://evolusys.com/contact-evolusys.html

Hi there,
My web pages do not show the revolution ‘slider’ (header images). All the CSS & js files are linked though. But when you refresh the pages, the slider suddenly appears but not at the first attempt, especially while testing in Firefox browser. On Google Chrome, only the 'Homepage' and 'contact us' page show the slider/header images but not others. This is really weird. I AM ATTACHING PICTURES FOR YOUR REFERENCE
Live URL: http://evolusys.com/