Seam + MyFaces + Tomahawk not working

[AsukaLangley <c....@gmx.de>]

So I have a Seam Project and I'm trying to integrate Tomahawk 1.2. I've
copied the tomahawk12.jar in WebInf/lib and I have the following
configuration in web.xml:

<filter>
   <filter-name>MyFacesExtensionsFilter</filter-name>
  
<filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter</filter-class>
   <init-param>
       <param-name>maxFileSize</param-name>
       <param-value>20m</param-value>
   </init-param>
</filter>

<filter-mapping>
   <filter-name>MyFacesExtensionsFilter</filter-name>
   <servlet-name>Faces Servlet</servlet-name>
</filter-mapping>

<filter-mapping>
   <filter-name>MyFacesExtensionsFilter</filter-name>
   <url-pattern>/faces/myFacesExtensionResource/*</url-pattern>
</filter-mapping>
<filter-mapping>
    <filter-name>MyFacesExtensionsFilter</filter-name>
    <url-pattern>*.seam</url-pattern>
</filter-mapping>

I want to use the Scheduler but I get the following Exception:

"Caused by: javax.el.ELException:
/pages/Interpreter/interpreterCalendar.xhtml @28,67
value="#{schedule.model}": Error reading 'model' on type
org.javassist.tmp.java.lang.Object_$$_javassist_seam_2
        at
com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)
        at
javax.faces.component.ValueBindingValueExpressionAdapter.getValue(ValueBindingValueExpressionAdapter.java:113)
        ... 66 more
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
        at
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)
        at
org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:76)
        at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
        at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
        at
org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:54)
        at
org.javassist.tmp.java.lang.Object_$$_javassist_seam_2.getModel(Object_$$_javassist_seam_2.java)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at javax.el.BeanELResolver.getValue(BeanELResolver.java:62)
        at
javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
        at
com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
        at
org.jboss.el.parser.AstPropertySuffix.getValue(AstPropertySuffix.java:53)
        at org.jboss.el.parser.AstValue.getValue(AstValue.java:67)
        at
org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
        at
com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
        ... 67 more
Caused by: java.lang.LinkageError: loader constraint violation: loader
(instance of org/jboss/web/tomcat/service/WebCtxLoader$ENCLoader) previously
initiated loading for a different type with name
"org/apache/myfaces/custom/schedule/model/SimpleScheduleModel"
        at $Proxy234.getModel(Unknown Source)
        ... 89 more"


any ideas?
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