CP Page tags not working

Hi All,

I want to show the below widget to particular pages, i tried below code but no luck

Messagebase details:

Configuration details:

Tried step 1

    <rn:condition show_on_pages="#rn:msg:CUSTOM_MSG_CONFIRM_POPUP_PAGE_DETAILS#" >
        <rn:widget path="custom/ConfirmDialog"/> 
    </rn:condition>

Tried step 2

<?php $pageDetails=\RightNow\Utils\Config::getMessage(CUSTOM_MSG_CONFIRM_POPUP_PAGE_DETAILS);?>
    <rn:condition show_on_pages="<?=$pageDetails;?>" >
        <rn:widget path="custom/ConfirmDialog"/> 
    </rn:condition>

Tried step 3

    <rn:condition show_on_pages="#rn:msg:CUSTOM_CFG_CONFIRM_POPUP_PAGE_DETAILS#" >
        <rn:widget path="custom/ConfirmDialog"/> 
    </rn:condition>

The above steps i have followed but no luck can someone kindly suggest how to achieve this one