Unread Urls by search engine

Hi every one ! I have a problem with my website the URLs are not read by search engines. Did you have the same problems when you used the contao CMS ?
We had already changed the htaccess file as recommended on forum. Thank you in advance, we are really stuck at this point.

I've never experienced this, Contao is really good with it's SEO, so don't really have a solution for you.
What I find is that usually a bit of patience helps (usually weeks), then you might get crawled by a spider ;)
http://en.wikipedia.org/wiki/Web_crawler

Maybe someone put a 'robots.txt' file into your root?, they block the crawlers and look something like this

Code:

---

User-agent: *
Disallow: /folder1/
Allow: /folder2/

---

Also you should look at a Google Webmaster account. Their tag line is "You want to be found on the web. We want to help", does that sound like what you're looking for maybe?
http://www.google.com/webmasters/