I have a rich:simpleTogglePanel component that I want to set in my bean as to the whether the panel is open or closed.  I have tried many combinations but when I set it up to the way that I have seen in some examples I get the following error

Can't set property 'dateFilterOpened' on class 'net.mecoil.xman2.actions.diagnosis.HistoryAction_$$_javassist_seam_67' to value 'false'.: java.lang.IllegalArgumentException: argument type mismatch

the xhtml setup for this panel

<rich:simpleTogglePanel switchType="ajax" opened="#{historyAction.dateFilterOpened}" action="#{historyAction.dateFilterOpened} reRender="dateFilterContainer">

In my bean I have the following

private String dateFilterOpened = "closed";

public boolean isDateFilterOpened() {

     Utils.logTrace(this, "isDateFilterOpened=" +  this.dateFilterOpened);

     if ( this.dateFilterOpened == null) {

          return false;

     } else if ( this.dateFilterOpened.equalsIgnoreCase("true")

     || this.dateFilterOpened.equalsIgnoreCase("opened")

     || this.dateFilterOpened.equalsIgnoreCase("open")) {

     return true;

     } else {

     return false;

     }

}

public String getDateFilterOpened() {

     if ( this.dateFilterOpened == null) {

     return "closed";

     } else {

     return this.dateFilterOpened;

     }

}

public void setDateFilterOpened(String inValue){

     Utils.logTrace(this, "setDateFilterOpened:Value=" + inValue);

     this.dateFilterOpened = inValue;

}

public void setDateFilterOpened(boolean inValue){

     Utils.logTrace(this, "setDateFilterOpened:Value=" + inValue);

     if ( inValue) {

     this.dateFilterOpened = "opened";

     } else {

     this.dateFilterOpened = "closed";

     }

}

I'm at a loss to understand what the problem is.  I had errors when I tried to setup the property as a boolean also.

Dave