Accessing subdomains

[jbsarma]

I have a domain that I can access through both http://accb.net and http://www.accb.net. But the subdomain that I made under the domain can only be accessed through http://access.accb.net but not http://www.access.accb.net. If I call the subdomain using www the I get redirected to the main domain rather than to the subdomain.

I am not sure why but I would like the subdomian to be available as usual i.e., just by simply putting 'www' in addition to 'http'. Please help.

 

[jbsarma]

Any solution please!!