BP Enable Root Profiles produces 404 errors

I am following directions from:

https://premium.wpmudev.org/blog/6-buddypress-power-hacks-you-dont-want-to-miss/

and

http://codex.buddypress.org/extending-buddypress/changing-internal-configuration-settings/

I placed define ( ‘BP_ENABLE_ROOT_PROFILES’, true );

into my wp-config.php above the “/* That’s all, stop editing! Happy blogging. */” line.

I have the latest wordpress and buddypress. I have also updated my permalinks, yet nothing happens.

What am I doing wrong? I was in a live chat before with V and it worked for him.

Could this be a host issue? Like server rewrite or mod rewrite or something?