Hi Reza.
During the import of the certificate in BI, please specify client number to 100 in ACL. If you still face the problem, you should delete the ticket of the portal and generate the new one with CN name as different.
For example: CN-<Hostname_port>
Then export the certificate and import it to ABAP again.Here the SID should be the SID of your Portal,, which is same as your ABAP in your case and client as 100. Also run Tcode SS02 after the import and check everything is green there.
Then check that your SSO is working fine or not by Login into portal->system administration->Support->SAP application->Transaction->select the system alias and give any Tcode,, select GUI for windows, press enter.
If SSO is fine it should login you into the backend and display the Tcode you specified.
If your SSO is not fine it will display you the reason there.
Thanks
Shankar