Taxonomy pages don't display wp_nav_menu! ROAR.

I have two custom taxonomies:
Genres
Playlists

And for each one, several terms that belong to it:
Pop, Country, Hip-Hop, etc.
Party, Barbeque, Relaxing, etc.

When I go to any of my taxonomy pages (by, for instance, clicking on a link in a wp_tag_cloud), my normal custom menu which works everywhere else doesn’t display. I’m modifying the twentyeleven theme to do this.

I tried changing the wp_nav_menu call in header.php to get the menu by name (“Tab Menu”) instead of by theme location. This caused taxonomy pages to display the backup nav_menu, which just uses all of my pages. This is not what I want – I want my original custom menu to display as it does on every other page.

HELP!

P.S. My site is https://www.bigtimebeats.com. Check out one of the Genres pages or Playlists pages (never mind the content) to see what I’m talking about.