Bonjour à tous,

Après l'installation de 11g sur un server hergeant des bases 10g, je n'arrive plus à me connecter avec "sqlplus / as sysdba"

sur les bases 10g, ni à redémarrer ou à stoper le listener dans l'env 10g.

=> C:\Documents and Settings\ADM>sqlplus / as sysdba

SQL*Plus: Release 11.1.0.6.0 - Production on Thu Dec 10 11:27:53 2009

Copyright (c) 1982, 2007, Oracle. All rights reserved.

ERROR:
ORA-12557: TNS:protocol adapter not loadable

Enter user-name:
ERROR:
ORA-12557: TNS:protocol adapter not loadable


Enter user-name:
ERROR:
ORA-12557: TNS:protocol adapter not loadable


SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus



==>> C:\Documents and Settings\ADM>lsnrctl stop

LSNRCTL for 64-bit Windows: Version 11.1.0.6.0 - Production on 07-DEC-2009 11:24:11

Copyright (c) 1991, 2007, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.175.13.115)(PORT=1521)))
TNS-12557: TNS:protocol adapter not loadable
TNS-12560: TNS:protocol adapter error
TNS-00527: Protocol Adapter not loadable

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
TNS-12557: TNS:protocol adapter not loadable
TNS-12560: TNS:protocol adapter error
TNS-00527: Protocol Adapter not loadable
Merci de l'aide.