Installation Issue - Gallery Module not showing up in Drupal

Hello:

I have a Drupal Installation (4.7) and a successful install of Gallery2. Both are working well independently of each other, but I would like Gallery2 to work with Drupal. I have downloaded the gallery module and put it in the modules folder for the Drupal installation. However, It doesn't show up in the Drupal->Admin->Modules area. Not sure if there is a setting I need to change or put the module in a different folder...I'm kind of at a loss...

Any thoughs? Ideas?

Thanks,
Andrew Saxe