H:selectOneMenu not submitting correctly

I'm having a problem with the h:selectOneMenu not submitting correctly. It never gets to execute the action on the command button. If I change to use the inputText then it will allow me to set the value.
Any ideas what i'm missing?
<pb:form id="tradeaccountform">
 <pb:tag value="p">
 <h:outputText value="#{ClientBundle.selectDateInHistoryExp}"/>
 </pb:tag>
 <h:outputLabel value="#{ClientBundle.selectDateInHistory}" for="monthsback" />
 
 <h:selectOneMenu id="monthsback" value="#{TearcraftCustomerAccountBean.monthsBack}">
 <f:selectItems value="#{TearcraftCustomerAccountBean.historyMonths}"/>
 </h:selectOneMenu>
 <h:commandButton id="changedaterange" action="#{TearcraftCustomerAccountBean.dateRangeChangedAction}" value="#{ClientBundle.changeDateRange}" />
</pb:form>

I was trying to put a string in an int, how stupid do i feel after two days!!!

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brian

H:selectOneMenu not submitting correctly

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