I'm trying to install civicrm 4.6.10 with Drupal 7.41 on Ubuntu server 14.04 through Virtualbox. I installed successfully Drupal 7.41 and after that tried to follow the installation guide of civicrm. My first attempt was to use the "Install New module" though URL but it was not working. I have a "HTML-1" error. Related to posts I see on civicrm forum it could be due to redirection of sourceforge website that is maybe not well managed by Drupal. So I tried the alternative way, described in installation guide : manual installation. I download civicrm-4.6.10-drupal.tar.gz file from official repository and copy it in my drupal repository in /sites/all/modules folder and uncompress it. A civicrm folder has been correctly created. Coming back to Drupal administrator interface, going in Modules part, I see nothing related to civicrm. I tried to continue to follow the installation guide and tried to access to the installation script here : http://your_drupal_home/sites/all/modules/civicrm/install/index.php but file was not reachable.
What am I doing wrong ?
Thanks in advance for all help and advices you can provide to me.