Power switch error

I am setting a HA cluster using Advanced server 2.1,but had problem to make to WTI NPS115 power switch working, here is the messages:

Does anyboday ever make this power switch working?




May 19 23:13:55 unixsa cluster[10319]: <notice> Completed shutdown of Cluster Manager
May 19 23:14:01 unixsa clustonith: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:14:01 unixsa clustonith[10320]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:14:07 unixsa clustonith[10320]: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:14:07 unixsa clustonith[10320]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:14:38 unixsa clustonith: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:14:38 unixsa clustonith[10335]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:15:01 unixsa clustonith: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:15:01 unixsa clustonith[10366]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:15:07 unixsa clustonith[10366]: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:15:07 unixsa clustonith[10366]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:15:38 unixsa clustonith: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:15:38 unixsa clustonith[10379]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:15:44 unixsa clustonith[10379]: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:15:44 unixsa clustonith[10379]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:15:50 unixsa clustonith[10379]: Could not read line from WTI Network/Telnet Power Switch.
May 19 23:16:04 unixsa clustonith: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:16:04 unixsa clustonith[10390]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:16:10 unixsa clustonith[10390]: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 19 23:16:10 unixsa clustonith[10390]: <err> check_switch_config: Could not list hosts for WTI Network/Telnet Power Switch.
May 19 23:16:16 unixsa clustonith[10390]: Did not find string: ' ^M' fromWTI Network/Telnet Power Switch.
May 20 04:02:09 unixsa syslogd 1.4.1: restart.
Yanhui(Jackie) Li
Unix administrator
WWTSO 
Electronic Arts Inc
650-6285746