[eluser]PEN Vannak[/eluser]
Any way, if you still have the problem such as Error Internal Server, you need to go to configure your appache.
Open your
httpd.conf and try to fine the code
#LoadModule rewrite_module modules/mod_rewrite.so and place it to
LoadModule rewrite_module modules/mod_rewrite.so (take out comment '#' sign).
I hope it will work 100%.
Thanks,