Webi Schedule error:Object failed to run due to an error while processing on the Job Server.

Dear,

     I have faced a problem when I wanted to schedule the Webi by E-MAIL,I have already tested the  telenet the mail server and port  from BO server, it

works fine.

      The schedule running error information is :Object failed to run due to an error while processing on the Job Server.

     I haved checked the logging file in the BO server file, there is a file <jobserver_BODEV.AdaptiveJobServer_WebIJavaSchedulingService_CHILD0_ncs> and there is error information shown as belown:

[Thr 9012] Wed Jul 29 10:53:45 2015

[Thr 9012] ***LOG Q0I=> NiPGetHostByName: '$SMDAgentHost' not found: getaddrinfo [ninti.c 897]

[Thr 9012] *** ERROR => Main agent failed to be initilized due to incorrect host setting! [ncsmtdatasen 20]

[Thr 9012] *** ERROR => Main agent failed to be initilized due to incorrect host setting! [ncsmtdatasen 20]

[Thr 9012] NCS trace timer is disabled since the interval is set to 0

[Thr 9012] NCS data timer is disabled since the interval is set to 0

     So what should i do to fix it, please help, thanks a lot!