I have installed component on j2.5.2 and see, links from module Dms Categories not have ItemID and I think regarding this I can't attach the module to display only the pages of the DMS component. When I click on category in this module, module is disappears from left position. When I go back, module showing as needed.
Can you help me to set up showing DMS modules only on DMS Component pages?
In this case, please make a menu item to link to Documents Seller component (categories view for example) and the extension will use ID of that menu item for Itemid variable.
If you don't want that menu item appear on the site, simply create a new Menu (I usually calls it as "Hidden Menu") and create the mentioned menu item in this Hidden menu.