Failed in changing sys password

Dear Experts,
Loged on as DBA I perform the following:
alter user sys identified by my_new_strong_pass
Trying then to log on as sys using this new pass, the pass is said not to be correct.
I'm running 9iR2. More (even if sys and system are not comparable) I can change the system password and log on corretly afterwards.
Any idea is appreciated.
Regards,
Guillaume

You are definitely right. I did so and it worked but the pb is I can't stay with SQLNET.AUTHENTICATION_SERVICES=(NTS) because using dba studio I get a "shared memory realm not available" if I try to restart the DB once stopped for any reason.
I need to set back to SQLNET.AUTHENTICATION_SERVICES=none. This behavior is new following the migration of the servers into AD. Buit keeping this "none" setting prevents me from connecting using Dba studio or Toad.
Did one of you already experience such a behavior of the DB ?
I don't have the same issue with the other instance hosted on the server, I mean connected as DBA I can change the pass of sys under Toad and connect with the new password keeping the setting to "none".
Best Regards,
Guillaume
Message was edited by:
[email protected]

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WE didnt set the password of SYS user in oracle but now we would like to set
I use the command alter user sys identified by password
i got message user altered
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Is this attempt where the db resides, or from a remote client:
sqlplus "sys/password@abc as sysdba"
On the other hand,
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- Incorrect PATH setting
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I suggest you to double check.
~ Madrid.

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