Custom Control and For loop in Rule

Hi,

i created a custom control with Smart Object.

i deployed and its working fine.

now issue is. i want to iterate that smartobject in for loop in rule as in below image. but its not showing any message on button click. (i verified the smart object attached. it has rows inside.)

i am using below in definition

<Category>Listing</Category>
    <Group>Documents</Group>
    <Name>MultiFile</Name>
    <DisplayName>Multi File</DisplayName>

    <ExecuteMethod></ExecuteMethod>
    <GetValueMethod></GetValueMethod>
    <SetValueMethod></SetValueMethod>
    <SetRulesMethod></SetRulesMethod>
    <SetItemsMethod></SetItemsMethod>
    <GetPropertyMethod></GetPropertyMethod>
    <SetPropertyMethod></SetPropertyMethod>

<Prop ID="DataSourceType" friendlyname="Type" type="complex" serverControlType="property" category="Data Source" InitializeServerControl="initializeAssociationPropertyConfig" ClearServerControl="clearComplexPropertyConfig" ServerControl="SourceCode.Forms.Controls.Web.PropertyConfiguration.AssociationPropertyConfig, SourceCode.Forms.Controls.Web" />
        <Prop ID="FixedListItems" friendlyname="Items" type="string" serverControlType="property" category="Data Source" ReadOnly="true" />
        <Prop ID="AssociationSO" friendlyname="SmartObject" type="string" serverControlType="smartobject" category="Data Source" ReadOnly="true" />
        <Prop ID="AssociationMethod" friendlyname="Method" type="string" serverControlType="listmethod" category="Data Source" ReadOnly="true" />
        <Prop ID="ValueProperty" friendlyname="Value" type="string" serverControlType="property" category="Data Source" ReadOnly="true" />
        <Prop ID="DisplayTemplate" friendlyname="Display" type="string" serverControlType="property" category="Data Source" ReadOnly="true" />

Please suggest if i am missing any configuration.

Regards,