Labels are not showing up in application built with Application Builder

Hello,

I am making a map using the ArcGIS Viewer for Flex - Application Builder everything works like I would like it to but I can't get my labels to show up for streets. They are turned on in the MXD that the service was made from. I've looked for a place to turn labels on and off in the builder but can't find one.

If anyone has suggestions that would be awesome,

Chris