I have a dedicated server with Cpanel , I used to run a blog at www.domain.com/blog Now i recently decided to delete the full blog and start a new Blog in SUBDOMAIN with same name . That is i decided www.blog.domain.com instead of www.domain.com/blog .. When i installed wordpress , and tried to check , www.blog.domain.com in my browser , it showed error.... I Thaught its funny ! How it is possible as i did 'nt committed any mistake in task .... Now i tried the same thing again by installing wordpress on www.newsubdomain.domain.com instead of www.blog.domain.com It was working without any error ... WHY THE HELL www.blog.domain.com is not working Any body help as i need www.blog.domain.com only and not any other name for subdomain Only "Blog"