missing labels and pop-ups in feature services

I am starting a new thread since my issues have morphed since my original posting.

I am using Flex Viewer 2.4 (we won't have time to upgrade for a few months) and need to add a couple of ArcGIS Online feature services to our application. The features display in the viewer but there are three problems:

1. the labels (no scale dependency) don't display
2. xml pop-ups aren't active
3. no symbology appears in the TOC widget

Here are a couple different configurations I have experimented with on the two ArcGIS.com feature services:

<layer label="Top 50 Fish Barrier Removal Priorities" type="feature" visible="true" alpha="1" useamf="false"
url="http://services.arcgis.com/F7DSX1DSNSiWmOqh/ArcGIS/rest/services/WIFO_GBT_DUCK_RSX_TOP/FeatureServer/0">
<sublayer id="0" popupconfig="popups/RSX.xml"/>
</layer>

<layer url="http://services.arcgis.com/F7DSX1DSNSiWmOqh/arcgis/rest/services/WIFO_GBT_DUCK_RSX_OTHER/FeatureServer/0" visible="true" alpha="1.0" mode="onDemand" useamf="false" label="Other Surveyed Potential Barriers" type="feature"/>
<sublayer id="0" popupconfig="popups/RSX.xml"/>

Could someone kindly correct my code?

Thanks!