Doesn’t work with custom login on wpjobboard.net

I tried the plugin with the wbjobboard.net job board, and the front-end account creation system doesn’t get touched by this plugin. I was able to use their account creation page to create an account with password, “abcdefg”, despite the fact that I had previously put the following function in my functions.php file for the theme:

/* To trigger strong password enforcement for all users: */
if ( function_exists( ‘slt_fsp_init’ ) ) {
//plugin is activated
add_filter( ‘slt_fsp_caps_check’, ‘__return_empty_array’ );
}