I have just changed my single blog to a multi site network using the multi-site enabler plug-in. I got the sub site created. It's one sub folders instead of domains. When I click on Backend to set up the new sub site, it takes me to an unformatted front page, with no theme and the line Page Not Found at the top. Typing in the url with /wp-admin at the end brings up the same page.
I have searched here and on Google, but can't seem to find any one else that has had the same problem. I know the server side is set up correctly, because my husband did this same thing before me and his multi-sites work fine.
Any help of advice would be greatly appreciated.