How to call action method from pageflow

[tkalactomo]

<start-page name="sample" view-id="/sample/sample/PageSample.jsp"
 timeout="3600000">
 <redirect/>
 <description>#{messages['sample.sample']}</description>
 <transition name="sampleTransition" to="sampleDecision"/>
 </start-page>

 <decision name="sampleDecision" expression="#{sampleBean.sampleAction}">
 <transition name="OK" to="sample"/>
 <transition name="NOT" to="notDefinedSample"/>
 </decision>

[tkalactomo]

sorry about double topic right one is the other...
I have used the back button...and instead of reply on topic i opened new one....