wicket.Inizializer Error

Hi,
i wont create an application base with Qwicket examples.

I port all in maven2 project with eclipse, but when i run in eclipse
application i recived this exceptio:

 >>> STARTING EMBEDDED JETTY SERVER, PRESS ANY KEY TO STOP
INFO  - /geosdiSystem              - Loading Spring root
WebApplicationContext
INFO  - MLog                       - MLog clients using log4j logging.
INFO  - C3P0Registry               - Initializing c3p0-0.9.1.2 [built
21-May-2007 15:04:56; debug? true; trace: 10]
INFO  - stractPoolBackedDataSource - Initializing c3p0 pool...
com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 3,
acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose
-> false, automaticTestTable -> null, breakAfterAcquireFailure -> false,
checkoutTimeout -> 0, connectionCustomizerClassName -> null,
connectionTesterClassName ->
com.mchange.v2.c3p0.impl.DefaultConnectionTester, dataSourceName ->
2sa1hg7vbzad5r1fg1gda|2394f8, debugUnreturnedConnectionStackTraces ->
false, description -> null, driverClass -> org.postgresql.Driver,
factoryClassLocation -> null, forceIgnoreUnresolvedTransactions ->
false, identityToken -> 2sa1hg7vbzad5r1fg1gda|2394f8,
idleConnectionTestPeriod -> 0, initialPoolSize -> 3, jdbcUrl ->
jdbc:postgresql://localhost/geosdiSystem_db, maxAdministrativeTaskTime
-> 0, maxConnectionAge -> 0, maxIdleTime -> 0,
maxIdleTimeExcessConnections -> 0, maxPoolSize -> 15, maxStatements ->
0, maxStatementsPerConnection -> 0, minPoolSize -> 3, numHelperThreads
-> 3, numThreadsAwaitingCheckoutDefaultUser -> 0, preferredTestQuery ->
null, properties -> {user=******, password=******}, propertyCycle -> 0,
testConnectionOnCheckin -> false, testConnectionOnCheckout -> false,
unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies ->
false ]
ERROR - log                        - failed QwicketApplication
java.lang.ClassCastException: wicket.Initializer
    at org.apache.wicket.Application.addInitializer(Application.java:755)
    at org.apache.wicket.Application.load(Application.java:829)
    at
org.apache.wicket.Application.initializeComponents(Application.java:608)
    at
org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:567)
    at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:99)
    at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
    at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:594)
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
    at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
    at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
    at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
    at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
    at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
    at org.mortbay.jetty.Server.doStart(Server.java:220)
    at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
    at it.nsdi.geosdi.Start.main(Start.java:35)
ERROR - log                        - Failed startup of context
org.mortbay.jetty.webapp.WebAppContext@76ec7a{/geosdiSystem,src/main/webapp}
java.lang.ClassCastException: wicket.Initializer
    at org.apache.wicket.Application.addInitializer(Application.java:755)
    at org.apache.wicket.Application.load(Application.java:829)
    at
org.apache.wicket.Application.initializeComponents(Application.java:608)
    at
org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:567)
    at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:99)
    at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
    at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:594)
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
    at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218)
    at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500)
    at
org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
    at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
    at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117)
    at org.mortbay.jetty.Server.doStart(Server.java:220)
    at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
    at it.nsdi.geosdi.Start.main(Start.java:35)

What is the problem?

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