Subdomain problem

I set up a subdomain ‘blog’ http://blog.domain.com

I installed WP to http://www.domain.com/blogs

Everything was all right… But, my server don’t support subdomain anymore… Now.. I can’t access the WP page to change my url, blog.domain.com to http://www.domain.com/blog

what I need to do?

Thanks!

Fábio Nogueira
Salvador – Bahia – Brazil