Logon is not possible because you have not been assigned to a business role; please contact your system administrator

Hi experts,

I'm having a problem when our project approaching the end.

If I assigned the business role in parameter CRM_UI_PROFILE and PFCG role in SU01.

It works fine,and the user can logon the web ui.

Now I created a new organization model and position,assigned the business role and user to the position.

   A PFCG role was also assigned to the business role:

Then I removed all the roles and profiles in user master in SU01.

The user can not login CRM WEB UI and the system raised "Logon is not possible because you have not been assigned to a business role; please contact your system administrator".

Can anybody suggest what the problem is? Is there any other settings I should make?

I suppose that,since the user was assigned to the position the organizational model, the system can determine the user's business role, and through the business role, the corresponding PFCG role can also be determined.

Am I correct?

Thanks.

Jerry