I plan on serving ads on my site to many subdomains and I am trying to get it running through an advertising serving system that I am setting up on my domain, I have set up a subdomain for this ad network (which is my only planned ad network right now) and set up one page with just the ads for including in my other pages through the serving system but it will not validate. I need help getting it to validate and knowing if this will in some way impact my weight and if so how to get it to not without having to set up my 5+ sub domains separately and in such a way that I can not switch ad networks without editing every page on my site.