[Koha] Need help to install koha ..

Hi friends my name is Rakesh . I had tried to install koha on ubutu 9.10 based on the information from the site http://everydaytechy.blogspot.com/ .Every thing I followed was fine when I open it on browser 404 error is on my web page."site not found in apache2 location " I need u all the experts help, because am new in linux . And also give me u r suggestion THANKS