javax.faces.application.ViewExpiredException occured using Portlet Bridge and Richfaces.

Issue

• I have deployed a portlet using JSF1.2 and richfaces3.3.1 in JBoss 5.1. However, when i click on the a4j components, it will return the following error:

    SEVER [lifecycle] JSF1054: (PhaseID: RESTORE_VIEW 1, View ID: )Exception thrown during phase execution: javax.faces.event.PhaseEvent[source=com.sun.faces.lifecycle.LifecycleImpl1b35c58]
    ERROR Exception in the filter chain
    javax.servlet.ServletException: viewId: /myPage.jsf - View /myPage.jsf could not be restored.
    ....
    ....
    Caused by javax.faces.application.ViewExpiredException: viewId: /myPage.jsf - View /myPage.jsf could not be restored.

Is there any way to overcome this issue?