Subdomains not working

[Paradox Servers]

I'm trying to create a subdomain but it keeps erroring when I try accessing the page. The normal domain works - any ideas?.

[cPanelDon]

Is the error displayed within cPanel, or is the error displayed when loading or testing the new sub-domain?

Please provide the error detail if possible; any extra details may help to narrow the possible causes.

[saninfosys.com]

Login to cpanel and click on subdomains icon to check whether your created subdomain is exist or not. If it is exist, put any test file (e.g. test.html) into the subdomain folder. Go to browser and check like http://subdomain.yourdomain.com OR http://yourdomain.com/subdomain/