网页无法在Linux上运行

I have a webpage that uses PHP, AJAX and JavaScript to display some graphs and other data. When using Apache 2.2.1, the page runs fine when hosted in Windows but on running in Linux, i can see my page elements but i do not see any data, which i believe means that no data is being received through the AJAX calls. What's going wrong here ?

----------------------------------EDIT-----------------------------------------------------

Alright, i checked the return value of the AJAX calls ( the responseText ). Its coming out to be null. What could be the problem ?

Have you installed PHP? Are you running apache on the linux box? Can you echo a string with PHP? Do you have javascript enabled on the web browser?

please be sure if filesystem really is the same in windows and in linux. i doubt that it is regarding hosting pages.