JSF 1.2 commandButton not working as expected

Question

I have a commandButton like this ...

<h:form>
<h:outputLabel
value="#{selectPage.car.planStage.planStageId != 3}"></h:outputLabel>
 <h:commandButton id="btn_CA_plan"
 styleClass="btn btn-success"
 action="#{selectPage.btn_CA_plan_action}"
 value="Submit CA plan"
 disabled="#{selectPage.car.planStage.planStageId != 3}">
 </h:commandButton>
</h:form>

the h:outputLabel shows "false" disabled="#{selectPage.car.planStage.planStageId != 3}" evaluates to false by the way When I click it, it doesn't execute the function, even though when I remove the disabled attribute, it works fine