ora-1034(urgent)

Hi,
I just ran into a problem. When I do svrmgrl,connect internal,shutdown immediate; I get the ora-1034. I am using user oracle. I check my env. $ORACLE_SID,etc are set correctly. the db has been working properly all along. Any help (the ways to tackle the problem)would be appreciated.

O.K., I found the problem. The reason is that my sysadmin for some reason changed my env. I just changed it back. Everything is fine now. Thanks everybody anyway.