Error while Testing master failover about mysql-master-ha HOT 8 CLOSED

Read error messages carefully.
"ssh: Could not resolve hostname remote_host1: Name or service not known"

So "remote_host1" should be an appropriate remote hostname on your environment.

Where do I modify the remote_host1 ? As in which file?

Also once I get the Master up it again says 
Ping succeeded, sleeping until it doesn't respond..

ok changed the remote_host1 to localhost ,but getting the following errors!


Master was running on port 3308(mysql 4.1) and slave was running on port 
3306(mysql 5.1.1)


app1: MySQL Master failover 127.0.0.1

Master 127.0.0.1 is down!

Check MHA Manager logs at adaministrator-laptop for details.

Started automated(non-interactive) failover.
Invalidated master IP address on 127.0.0.1.
Power off 127.0.0.1.
The latest slave 127.0.0.1(127.0.0.1:3306) has all relay logs for recovery.
Selected 127.0.0.1 as a new master.
127.0.0.1: OK: Applying all logs succeeded.
Failed to activate master IP address for 127.0.0.1 with return code 2:0
Got Error so couldn't continue failover from here.
Wed Nov  9 10:53:00 2011 - [info] Sending mail..
sh: /script/masterha/send_master_failover_mail: not found
Wed Nov  9 10:53:00 2011 - 
[error][/usr/local/share/perl/5.10.1/MHA/MasterFailover.pm, ln1516] Failed to 
send mail with return code 127:0
[1]+  Killed                  sudo masterha_manager --conf=/etc/app1.cnf

Have mailed you the entire log file details.

Read logs carefully..

"sh: /script/masterha/send_master_failover_mail: not found"

Please set this script, or remove "report_script" parameter from configuration 
file.

That is not the primary cause of the error,even after commenting that, only the 
last two lines of error log wont appear ,rest of it continues to exist. Have 
mailed you the error log I got after removing report_script.