Indexing a website

Hi I made a website for a client and ist not being indexed by google for some reason! I tried requesting and index but nothing happened… I have a sitemap etc… any ideas?

It can take a few weeks. You made an account and submitted to Google Webmaster Tools?

Yes I did a while ago and nothing happened… could it be that there is a robots.txt somewhere? And if yes how do I find it and remove it?