Error ASM IO exception: The Network Adapter could not establish the connection.

When you see this error, the first thing you must check is the Oracle's listener.

[oracle@tatshuya]$ ps -ef |grep lsn
oracle 16197 15713 0 12:20 pts/2 00:00:00 grep lsn

there is no listener process start in this server, you can start by command.
[oracle@tatshuya]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 14-DEC-2009 12:22:50

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

Starting /oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.4.0 - Production
System parameter file is /oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=tatshuya)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date 14-DEC-2009 12:22:50
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File /oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=tatshuya)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

[oracle@tatshuya]$ ps -ef |grep lsn
oracle 16204 1 0 12:22 ? 00:00:00 /oracle/product/10.2.0/db_1/bin/tnslsnr LISTENER -inherit
oracle 16256 15713 0 12:35 pts/2 00:00:00 grep lsn


After start the listener process, retry again, you should see the next step to configure ASM Disk Group.