Oracle database configuration assistant: error

Hi folks,
I was installing Oracle9i Application Server when suddenly got a problem. The pre-installation task were okay the setting of environment variable. I got at least 1GB of swap configured before I run the installer, I have a fully qualified domain name(FQDN) specified for the installation and I got no problem with that . But while I am installing the infrastructure, there are several errors occurred and some of them were said to be an expected behavior and fixed that already. The only thing that I haven't configured yet is the error saying:
Oracle Database configuration Assistant: ERROR
ORA-01503: CREATE CONTROLFILE failed
If you have experienced this kind of error and have fixed this, your advice,opinions and suggestions are very much welcome.
Thanks!
