annotation in flex viewer

[evanpicard]

Im trying to load an annotation layer in the flex viewer.  I get a useless grey box.

<operationallayers>
<layer label "Regionannao30M" type="feature" visible="true"
url="http://server/arcgis/rest/services/anno/mapserver/0"/>
</operationallayers>

please help.  What am I missing?
Thank you.
Evan

[evanpicard]

really?  nothing?

[AlexSanders]

I've never tried implementing an annotation layer as a feature service.  I've always used them in dynamic map services and they've worked.  Maybe that's the issue?