Can't Get Shortcode Parameters to Work

I’m sure it’s user-error, but I can’t figure it out.

Right now I’m trying to get rid of the gravater after log in.

Here’s what I’m using (I’ve tried the visual & text/html editors):
[theme-my-login show_gravatar=”false”]

Is there a setting I have to enable before the parameters first?

I’m using theme twenty twelve and have deactivated all plugins.

Also worth noting I am using a staging environment.

https://www.ads-software.com/extend/plugins/theme-my-login/