[Koha] Fwd: help

I need to install Koha as soon as possible. ... I installed koha for windows through your pdf docs. with the following software apache 2.2.14 mySql 5.1.45 active perl 5.8.9 & koha 2.2.9 R1 & after installation .. MySQl & apach are running normally but i got this error when i tried to log on to Intranet Error 500 internal server error , The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, webmaster@dummy-opac and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. Please advise -- Irinie Radany Nakhla