Question regarding action form

[Manisha M Sathe]

I have a action form

public class ReconThresholdEditForm extends ValidatorForm 
{
..
   private ReconRuleBO reconRuleBO = new ReconRuleBO();
..
}

ReconRuleBO has collection of thresholdsBOs

public class ReconRuleBO {
..
        private Collection thresholdCollection = new ArrayList();
}

public class ReconThresholdBo {
        private String thresholdValue;
}


In my JSP I am displaying Rule and looping through all threshold 
collection and displaying the thresholdValue. The problem I am facing is 
when user submits the form, how can I get these threshold values in the 
action form ? 
I am getting reconRuleBO  as null.

Thanks and regards
Manisha