Changing directory

Hello,

I am using apache2triad and drupal is installed to this directory \htdocs\drupal .

So when I go to my site, I get the htdocs folder list. I tried going into the httpd file and change the document root to \drupal but when I go to restart the apache server service, it will not start back up. Once I put the setting back, it starts up no problem..

How can I fix this?