Did you install it with cPanel or did you manually install it on the server? Because if you did it through cPanel, it is very likely you installed an older version. If this is the case, I strongly suggest installing the latest version.
If you did install the latest one it might help giving more details, like serverinfo, any errors, php version etc etc. Also check your log files to see if there is anything usefull in there.
There are also multiple topics about this problem, so perhaps you can try to find your solution there.