> <http://www.w3schools.com/css/>
> 
> But I get only 5 to 10 files and the download
> finished in 15 seconds. Here is the log
> 
> Am I doing some thing wrong. 
You are doing nothing wrong, if the Browser ID contains Httrack the site
returns a blank page essentially.

I ALWAYS run with browser id set to:
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)