Hi.
I'm new to JBossSeam. I tried to create my first project with seam-gen in command prompt and then I opened it in Eclipse (I haven't added or removed any file from the project).
Then I run the server in command prompt but I got the following error:

18:56:57,328 ERROR [[/mySeamProj4]] Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener
java.lang.RuntimeException: Could not create Component: org.jboss.seam.core.expressions
at org.jboss.seam.init.Initialization.addComponent(In itialization.java:976)
at org.jboss.seam.init.Initialization.installComponen ts(Initialization.java:903)
at org.jboss.seam.init.Initialization.init(Initializa tion.java:548)
at org.jboss.seam.servlet.SeamListener.contextInitial ized(SeamListener.java:34)
at org.apache.catalina.core.StandardContext.listenerS tart(StandardContext.java:3763)
at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4211)
at org.apache.catalina.core.ContainerBase.addChildInt ernal(ContainerBase.java:759)
at org.apache.catalina.core.ContainerBase.addChild(Co ntainerBase.java:739)
at org.apache.catalina.core.StandardHost.addChild(Sta ndardHost.java:524)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)

etc.........


I'm stuck with this issue and I can't find a way out...
Please give me a piece of advice.

Thanks a lot!