[OpenSER-Users] Problem in stopping wesip

Hi All, I am having problems in stopping the wesip server , I am not able restart it again and it also gives problem when i try to stop it : Log Message while trying to start ./startup.sh Starting WESIP Application Server VozTelecom... [root@localhost bin]# HttpConnector [main] - The [all:7080] has been created Exception during startup processing java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(libgcj.so.7rh) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:156) Caused by: java.lang.NoClassDefFoundError: java.util.concurrent.ConcurrentHashMap at com.voztele.sipservlet.connector.SipConnector.start(SipConnector.java :202) at org.apache.catalina.core.StandardService.start(StandardService.java :454) at org.apache.catalina.core.StandardServer.start(StandardServer.java :2144) at org.apache.catalina.startup.Catalina.start(Catalina.java:471) at org.apache.catalina.startup.Catalina.execute(Catalina.java:358) at org.apache.catalina.startup.Catalina.process(Catalina.java:129) at java.lang.reflect.Method.invoke(libgcj.so.7rh) ...1 more Starting WESIP Application Server VozTelecom... [root@localhost bin]# HttpConnector [main] - The [all:7080] has been created Exception during startup processing java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(libgcj.so.7rh) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:156) Caused by: java.lang.NoClassDefFoundError: java.util.concurrent.ConcurrentHashMap at com.voztele.sipservlet.connector.SipConnector.start(SipConnector.java :202) at org.apache.catalina.core.StandardService.start(StandardService.java :454) at org.apache.catalina.core.StandardServer.start(StandardServer.java :2144) at org.apache.catalina.startup.Catalina.start(Catalina.java:471) at org.apache.catalina.startup.Catalina.execute(Catalina.java:358) at org.apache.catalina.startup.Catalina.process(Catalina.java:129) at java.lang.reflect.Method.invoke(libgcj.so.7rh) ...1 more Error log while stopping : [root@localhost bin]# ./shutdown.sh Stoping WESIP Application Server VozTelecom... [root@localhost bin]# Catalina.stop: java.net.ConnectException: Connection refused java.net.ConnectException: Connection refused at gnu.java.net.PlainSocketImpl.connect(libgcj.so.7rh) at java.net.Socket.connect(libgcj.so.7rh) at java.net.Socket.connect(libgcj.so.7rh) at java.net.Socket.<init>(libgcj.so.7rh) at java.net.Socket.<init>(libgcj.so.7rh) at org.apache.catalina.startup.Catalina.stop(Catalina.java:540) at org.apache.catalina.startup.Catalina.execute(Catalina.java:360) at org.apache.catalina.startup.Catalina.process(Catalina.java:129) at java.lang.reflect.Method.invoke(libgcj.so.7rh) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:156) Please Help -- Thanks Saurabh Agarwal