New pages not added

[sayed_hashim808]

The reason I guessed linux is that I'm guessing it's a file permsision/owner issue.  

If your folder is in var/www try
sudo chown -R $USER:$USER /var/www/
sudo chmod -R 755 /var/www

You may have to change $USER:$USER with www-data:www-data
The best thing to do is to figure out what the owner and permission level of the pages/folders that work are and see if the new folder is different.

Looks like the permission is set correctly (755)! 

Any other possibilities?