Help with Importing PHPBB 2.0.21 to vb 3.6.2

[relevantadmin]

I just recently imported my my phpBB install into vb and when I did all of my ranks we converted to ranks and user groups. I deleted all of the user groups hoping to move all users to the registered Users so they can post, but it only shows 4 users as Primary Users and 0 for Additional Users. I have over 8,000 users registered and I need to move them all to the Registered Users usergroup. Is there a way to do this? Any help would be great.

Thanks,
-toe

[Jerry]

Are they displayed in other usergroups in the admincp > usergroups section ?