Websphere 8.5.5.0 with IceFaces 3.3.0, ace:dataTable don't work fine

Question

I'm using ICEFaces 3.3.0. I have a problem with <ace:dataTable/>. When getting rowStateVar from RequestMap the result is NULL when running my application in Websphere 8.5.5.0, but it works fine in Jboss 7.1.1.

My code looks like this:

<ace:dataTable id="dataTable1"  
                var="info" value="#{manageBean.dataList}"
                         rowStateVar="rowState1"
                         stateMap="#{manageBean.stateMap1}"
                         selectionMode="single" 
                         rowSelectListener="#{manageBean.rowSelectListener1}"
                         rowUnselectListener="#{manageBean.rowDelectListener1}"
                         resizable="true" styleClass="table"> . . . </ace:dataTable>

Java:

FacesContext.getCurrentInstance().getExternalContext().getRequestMap().get("rowState1")

...returns NULL!