add plugin to "mu-plugins" dir and they dont show?

[Caddyman]

Hey all, new here I run talkdelaware.com a vB forum and talkdelaware.com/blogs is a MU install

i get instructions on plugins that say add so and so file to the "/wp-content/mu-plugins" directory and I do it as instructed and they dont show in the menu in WP admin panel. If i add them to "/wp-content/plugins" though, they do. most plugins work for me on my wpmu install by adding to the plugins dir

i tried to install the whoseesads mod that's was tweaked by farms to work with his 100 big ones theme pack and if i upload to "mu-plugins" it wont show in admin panel, if i up to "plugins" it shows in admin panel and throws a error when i activate it

it has to be something dumb im doing, any help?

TIA,
Caddy

(i asked on prem wpmudev and was directed here)

[Caddyman]

i think i got it figured out 

[Luke]

If you were looking for the plugin to show up under the "Plugins" menu, it won't if it's placed in the mu-plugins directory.

Basic MU right there.

[Caddyman]

Yes Luke, i know it's basic, as i said on premium site i am new to MU and it is far different then what i know (vBulletin) so i am probably going to have some simple questions.

Thank you,
Caddy