Please correct me if I am wrong. When you try to run the script you get a 500 Internal Server Error. If so this usually means that you have a configuration error in your script. It is a generic error message and can be caused by almost anything. Make sure you followed the directions for the config file and that you properly chmoded the necessary files.
when i place the htacess in my server i will got 500 internal sever Error..but when i took the htacess off and it's working fine.. so the htacess is fine? thanks again