Oracle, SuSE 8.0 and Error during the creation of the Database

Hi ! I am willing to get in touch with Oracle Database. I downloaded one of the latest product (Oracle Enterprise Edition 9.2 R2) The installation went smoothly. I put 100000000 on kernel.shmmax and change the semaphores according to the documentations. When I use dbca (a graphical tool to set up a Database), I got an error during the creation : ORA-27123: unable to attach to shared memory segment. Several SuSE Linux users have had this problem. Could you help me to find my way on the discovery of Oracle Database ?