in my case:
admin>settings>drigg module> untic the check box: “Only show promoted drigg stories when viewing a tag”
Leaving this to TRUE is good for SEO, since only promoted stories will get tag-related pagerank”

73

After installing,
at
administer > site configuration > community tags
select, for Community Vocabularies, “tags”

at
administer > access control; community tags module,
give authenticated users permission both to tag content and to edit own tags

at
administer > content types > Scoop
near the bottom of the page, select “Tab” as the Community Tagging form (the “inline” option is too congested in the Drigg theme; some tweaking of the theme, however, might make this a viable option)

The “example” tags described below the community tag submit field, are in line 362 of the file community_tags.module in the community_tags module directory; this text could be changed to be more suitable to the content of your site.

Now, when viewing a node (single item view), a tab will appear at the top of the page labeled “tags” -
opening this will permit any authenticated user to add tags to an existing item, tapping into the same taxonomy vocabulary in use for primary tagging of items when submitted.

Now the Tags: text on the nodes, will include only Tags vocabulary, without Category vocabulary intermixed. The separate Category: text will still come through fine.