prefix_config doesn't exist - Wordpress import error

[IconBoy]

I exported all my posts from Blogger to Wordpress.
Then I installed the Wordpress imort addon (v0.3) and have correctly filled in the database name, user, password etc. but when I click on Import, I get "Error: Table 'wpdb.prefix_config' doesn't exist"
(wpdb is replaced with my actual database name). I looked in PHPMyAdmin at the WordPress database but do not see anything with .prefix_config. All the tables are listed below.

Hope someone can help as I have about 500+ posts I would like to import into PP.