Bind checkbox to my managed bean

Hello! In my bean I have code:

private boolean realized=true;

public boolean isRealized() {

	return realized;

}



public void setRealized(boolean realized) {

	this.realized = realized;

}

When i bind it to my checkbox on xpage, checkbox was checked all fine, but when I process data on server, I get error: “java.lang.IllegalArgumentException argument type mismatch”