hi as for the subdomain , is it possible to set the subdomain like http://bbs.abc.com but not http://www.bbs.abc.com ?

in plesk 2.5 , I added bbs.abc.com as the way I added normal domain . but only http://www.bbs.abc.com works . If I enter http://bbs.abc.com, it says page cant be displayed.

I even deleted www.bbs.abc.com A ip from the DNS list but still ....

Neither works for me. When you add a domain that's what should happen. Just tye bbs.abc.com in the Domain: text box and uncheck www prefix.