Check out http://drupal.org/project/issues/filedepot. And perhaps http://drupal.org/node/1895904 is your problem.

From: km

I am new to drupal7.
I have installed Filedepot (7.x-1.0-rc1) module. I created a Filedepot folder from contents and then uploaded files. But I donot see the left navigation menu and tagging options for the files uploaded. Am I missing something ?