error when try to log in

Hi,
im using CB 1.4 on joomla 1.6

if my users try to login (they are all in usergroup "registered") there is the followwing message:

Please log in or register to view or modify your profile.

i as a super user can login, and if i make u user to super user he can login, too.

all CB tabs have the access level "everybody" and every CB plugins have access level "public".
the login module has access level "public" too.

so why cant my users login ?

I've got exactly the same problem.

Joomla 1.9
CB 1.4
CB Paid subscription 1.1.2

Make sure you have a public menu item (mandatory) pointing to CB as the installation document states.

i had this public menu item, but it still didnt work.
after loking around the forum i found that nant said somewhere that there MUST BE something wrong with permissions.
he was right.
public users just were not allowed to register on my site^^
such a stupid problem...