Shared Memory Problem - Solaris 2.4 Oracle7.1.6

I've just installed Oracle on Solaris2.4 but I can only connect as oracle. I can't connect as any other user.
The database is installed on thor.

(thor)/var/opt/oracle>sqlplus
 

SQL*Plus: Release 3.1.3.7.1 - Production on Wed Aug 16 10:30:22 1995  

Copyright (c) Oracle Corporation 1979, 1994. All rights reserved.  

Enter user-name: scott/tiger
ERROR: ORA-01034: ORACLE not available
ORA-07429: smsgsg: shmget() failed to get segment. SVR4 Error: 2: No such file or directory    

(thor)/var/opt/oracle>ipcs -a

IPC status from <running system> as of Wed Aug 16 10:32:59 1995 Message Queue facility not in system.
T ID KEY MODE OWNER GROUP CREATOR CGROUP NATTCH SEGSZ CPID LPID ATIME DTIME CTIME Shared Memory:
m 400 0x08559afb --rw-r----- oracle dba oracle dba 74440064 2476 2492 10:30:16 10:30:16 10:29:30 T ID KEY MODE OWNER GROUP CREATOR CGROUP NSEMS OTIME CTIME
Semaphores:
s 262144 0x0x00000000 --ra-r----- oracle dba oracle dba 25 10:30:00 10:29:30
s 262145 0x0x00000000 --ra-r----- oracle dba oracle dba 25 no-entry 10:29:30
(thor)/var/opt/oracle>

Is this a permissions problem? What file or directory is it trying to get? How do I change the permissions on the shared memory segments?

Any help would be greatly appreciated!
Thanks.

--
Gerry
Gerald Skerbitz <gsker_at_med.umn.edu> U of MN Med School Admin 6-5379
Home St. Paul,Ramsey County,Minnesota, USA