php - All my links showing just home page, htaccess issue -

i unable visit page, menu link redirect me same home page. here htacess file, didn't understand after lot of googling even. kind regards

 options +followsymlinks  rewriteengine on  rewritebase /  #redirect 301 /?action=main.cancel_newsletter http://www.mysite.us/cancel   rewritecond %{query_string} ^action=main.cancel\_newsletter$  rewriterule ^/*$ http://www.mysite.us/cancel? [l,r=301]   rewritecond %{query_string} ^action=main.market\_news$  rewriterule ^/*$ http://www.mysite.us/news? [l,r=301]   rewritecond %{query_string} ^action=main.profiled\_companies$  rewriterule ^/*$ http://www.mysite.us/profiledcompanies? [l,r=301]   rewritecond %{query_string} ^action=main.adregister$  rewriterule ^/*$ http://www.mysite.us/register? [l,r=301]   rewritecond %{query_string} ^action=main.register$  rewriterule ^/*$ http://www.mysite.us/register? [l,r=301]   rewritecond %{request_filename} !-f rewritecond %{request_filename} !-d rewriterule .* /index.php [l]  <ifmodule mod_security.c>  secfilterengine off  secfilterscanpost off  </ifmodule>