'Hello World' problem

[eluser]george++[/eluser]
Hi Igniters!
I decided to play with the CodeIgniter because it looks very interesting. I've set up without problem the framework and I've followed the 'Hello World' video tutorial without problem up to the point where you can echo the 'Hello World' message.
But I am not able to continue to the next stage in which you load the blog_view view. My web browser shows an empty page. What I am doing wrong?

Thanks in advance!