Server Migration In Same HostProvider

Hi Developers...Am facing a critical problem.......I requested my host administrator for an upgrade in PHP so they told "we will change your server so please back up the files"

From cpanel>>BackUps>> i download home directory backup
and i Download files inside Public_html folder as zip and elgg's data folder also as zip(data folder was outside Public_html)

and then i opened phpmyadmin and exported my elgg database.....

After Server changed i uploaded files inside public_html folder and elgg's data folder to Home Directory

And created database and user with old same names and password...

and imported the database.....

And now its showing 404 error when accessing my website........So what To Do ??....