Smooth tool on paths

The problem is that you didn't set "Ignore white" when tracing and then you wmoothed the white areas instead of the black.

Better than smoothing afterwards is to set decent options for the trace so you don't have to smooth.

You might want to read the documentation. Jacob has posted the link.

omgl,

You may use Strokes under Tracing options to get stroked paths, and you may try out different settings:

https://helpx.adobe.com/illustrator/using/image-trace.html

You may also look here:

http://blogs.adobe.com/adobeillustrator/2013/07/image-trace-in-illustrator-a-tutorial-and-guide.html

You are likely just working on one of the elements while the actual appearance is produced by multiple objects. You have to drill down into the structure of the layer, ungrup items, release clipping paths and all that good stuff before you actually get to the objects. And well, in your case it seems you would be much quicker simply re-tracing it manually. Image trace is realyl only meant for much more complex items where it would take too long to do everything manually.

Mylenium