Cannot redeclare fbconnect_install()

Fatal error: Cannot redeclare fbconnect_install() (previously declared in /home/ratetion/public_html/m/modules/fbconnect/fbconnect.install:13) in /home/ratetion/public_html/m/sites/all/modules/fbconnect/fbconnect.install on line 72

I just downloaded fbconnect. I get this after i check the box to enable the module. I have Drupal 5.7. Thoughts?