!! help !! how to use the component "h:selectOneRadio" with "f:selectItems"

Hi,
h:selectOneRadio does not work. Here is a piece of my jsp code.
<h:selectOneRadio id="test" layout="pageDirection">
<f:selectItems value="#{myBean.myList}"></f:selectItems> </h:selectOneRadio>I defined myList as ArrayList or as ListDataModel. But nothing helps.
Ming

Value binding expression of the value must point to a SelectItem, an array or Collection of SelectItem objects, or a Map mapping labels to values.

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