Alternate Access Mappings SharePoint 2013 not working

Hi 

I have got two web applications with host headers in the farm.

WebApplication1: http://webapp1.company.com

WebApplication2: http://mysite.company.com

I have added AAM's for WebApp1 http://webapp1 in intranet zone. but i can't access using the intranet url.

The DNS entries are correctly configured.

Any ideas with this issue, please help

Thanks

sharedata