Larry, The problems you are having might have to do with symbolic links. Check out this post: http://drupal.org/node/30857; hopefully this will help clear it up. Cheers, Bill. Larry wrote:

Any help with multi -site installaion will be welcome. I am running 4.51 and all I get is a blank index page per for the other sites even though I am pinting the base ur;l to the right subdomain. the default site is fine.

Thanks Larry