A few people have problems to login after registration.
After you register, you will receive an E Mail confirming you username and password. The same E Mail will also require from you to activate your registration by clicking on the link given.
Although you have an username and password, your login will not work until you have clicked on the activation link given while connected to internet.
That will take you to the forum and activate you and you will be able to succesfully login.
If you still have difficulties, kindly send a mail to the administrator.