Could not open connection to Siebel Gateway configuration store

1. Today, i can't restart siebel server, from the siebel/ses/siebsrvr/log/SiebSrvr.log, it says that the error is caused by:

     Could not open connection to Siebel Gateway configuration store

2.  I check the siebel/ses/gtwysrvr/bin/gateway.cfg, all is fine.

3. checked the DB by sia/sia, it is ok.

4. check the DB by sadmin/sadmin, it reports that the user has been locked.

5. connect the DB with sysdba:

$ sqlplus / as sysdba

    

then issue the command:

  SQL> ALTER USER sadmin ACCOUNT UNLOCK;

6. restart the siebel server, the problem is over. :D