There are error messages below when started sqlplus and svrmgrl under 8.1.7. Also why it started 'Oracle9i Enterprise Edition Release 9.2.0.1.0 ' when I issued svrmgrl under 8.1.7?

1. SQLPLUS>
ERROR:
ORA-01821: date format not recognized


SP2-0152: ORACLE may not be functioning properly

SQL*Plus: Release 8.1.7.0.0 - Production on Mon Jun 27 09:43:20 2005

2. SVRMGRL>

Oracle Server Manager Release 3.1.7.0.0 - Production

Message 4505 not found; No message file for product=SVRMGR, facility=MGR

Oracle9i Enterprise Edition Release 9.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production