google not indexing my site

Hi All,

Google is not indexing my site, says it’s being blocked by robot.txt. I didn’t have a robot.txt file on my server, I added one to tell google to index the site and it only seemed to index the homepage. All other pages are still blocked. I have removed the request to have, “Discourage search engines from indexing this site”. I’ve generated a few sitemap.xml files and tested them on google webmaster tool and it keeps saying there is a robot blocking google. Please help.