Module rpaf_module is already loaded apache issue

Module rpaf_module is already loaded apache issue

I have problem on my CentOs 6 64bit VPS. I have tried to install
apachebooster 1.9 package which include nginx and varnish. The vps worked
perfectly but once I install the package, I can't get access to my
websites and when I try to restart httpd service I receive this message :
module rpaf_module is already loaded, skipping.
When i uninstall apachebooster the vps work.