captcha disappeared after trying to harden wp-content folder

denied execution of .php files in wp-content and the captcha image would not load

added this:

<Files *.php>
deny from all
</Files>

Q: is there a workaround for this or a way to create an exception for si-captcha?

Help appreciated.

Thanks,

Matt

http://wordpress.org/extend/plugins/si-captcha-for-wordpress/