Issue using the RTC 4.0 Extension Workshop - RTC Client not launching from the

When is launch RTC Client from the Server , iam getting an error below -"The application could not start, Please see the log" The log is given below . But the Client is Launching from

!SESSION Tue Sep 04 15:00:06 CDT 2012 ------------------------------------------

!ENTRY org.eclipse.equinox.launcher 4 0 2012-09-04 15:00:06.335

!MESSAGE Exception launching the Eclipse Platform:

!STACK

java.lang.ClassNotFoundException: org.eclipse.core.runtime.adaptor.EclipseStarter

                at java.net.URLClassLoader.findClass(URLClassLoader.java:423)

                at java.lang.ClassLoader.loadClass(ClassLoader.java:660)

                at java.lang.ClassLoader.loadClass(ClassLoader.java:626)

                at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:617)

                at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)

                at org.eclipse.equinox.launcher.Main.run(Main.java:1408)

                at org.eclipse.equinox.launcher.Main.main(Main.java:1384)