[26 Nov 2012  15:52:59:002] Error while reading server.xml.

[26 Nov 2012  15:52:59:002] java.lang.NullPointerException

[26 Nov 2012  15:52:59:003] at com.adventnet.nms.startnms.PrintMessage.getWebContainerPort(PrintMessage.java:380)

[26 Nov 2012  15:52:59:004] at com.adventnet.nms.startnms.PrintMessage.checkWebContainerPort(PrintMessage.java:326)

[26 Nov 2012  15:52:59:004] at com.adventnet.nms.startnms.PrintMessage.checkWebSvrConnection(PrintMessage.java:268)

[26 Nov 2012  15:52:59:004] at com.adventnet.nms.startnms.PrintMessage.run(PrintMessage.java:178)

[26 Nov 2012  15:52:59:181] Failed to establish connection with web server. Gracefully shutting down Web NMS

how can this problem be solved?please help me out.