Error in configuration file

I have copied my project folder from my live server to my local host and edited the config file as per localhost, but still i am displayed with the "Internal Server Error:500"

The server encountered an internal error or misconfiguration and开发者_运维技巧 was unable to complete your request.

Please contact the server administrator, admin@localhost 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.

I cannot understand what should be the problem here, please help me to track the issue here....

I found It, There was an issue with the apache setting, rewrite module was not activated... I rectified it.. Thank you all for your Guideline....