i keep getting an error 500 with the following .htaccess

Code:

Options +FollowSymlinks

RewriteEngine On

RewriteRule ^([^/]+)/?$ /game.php?sitetitle=$1 [NC,QSA,L]

RewriteRule ^people/([^/]+)/?$ /profile.php?n=$theuser [NC,QSA,L]
not sure what I am doing wrong....