If you have sub domains on same account on which vshare installed, sub domains will not work as .htaccess conflict with sub domains.

The problem can be solved by creating sub domain as its own account with cpanel user name and password. This is possible only if you have WHM (reseller or root access on the server).

Other solution is edit .htaccess file

If your sub domain is

http://dating.yourdomain.extn

You need to add following to .htaccess file

Code:
RewriteRule ^dating$ - [L]
RewriteRule ^dating/(.*) - [L]
You can add this below

Code:
RewriteRule ^install$ - [L]
RewriteRule ^install/(.*) - [L]