David,
There is a problem with your map service. Starting with the fact that it appears that you are publishing a shapefile which is not a good idea ad all. If it is not a shapefile then you need to show the objectid field. Also for performance reasons you should generalize highly detail state and county data at large scales. I was able to get geometry to draw using a featurelayer if I used a layerdefenition of "FID < 40", but it took FOREVER to draw.