404 php file, path click downloads the file

Hi, I’m running a ubuntu lamp stack, I have a js script which requires via ajax a php file, when I run the script It throws a 404 error can’t find the php file. However when I click the path it says it has 404’d on it downloads the php file it should be running? Therefore the path is correct?

This is the contents of an inspection: Remote Address: 192.11.11.11:8000 Request URL:http://192.11.11.11:8000/chat/store.php Request Method:POST Status Code:404 Not Found Response Headers view source Connection:keep-alive Content-Length:28 Content-Type:text/html; charset=utf-8 Date:Mon, 30 Nov 2015 11:10:22 GMT X-Content-Type-Options:nosniff X-Powered-By:Express Request Headers view source Accept:/ Accept-Encoding:gzip, deflate Accept-Language:en-US,en;q=0.8 Connection:keep-alive Content-Length:45 Content-Type:application/x-www-form-urlencoded; charset=UTF-8 Host:192.11.11.11:8000