php - .htaccess mod rewrite 500 error -


why of sudden start getting 500 error .htaccess file. havent changed 3 years, when access site 500 error. here .htaccess file. have removed root directory , created brand new blank index.php file , still error.

 options +followsymlinks  rewriteengine on  rewritebase /   rewritecond %{http_host} !^www\.thisismyurl\.com [nc]  rewriterule ^(.*)$ http://www.thisismyurl.com/$1 [r=301,l]   rewritecond %{request_filename} !-f  rewritecond %{request_filename} !-d  rewriterule ^(.*)$ /index.php [l] 


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