Can anyone tell me some simple steps to set up an autosizing smart component?  My smart components never autosize.  Here's what I do:

• Make a tube with a 8" ID
• Make a rod with an 8" OD
• Make an assembly with the OD of the rod mated to the ID of the tube.
• Select the rod and "Make Smart Component"
• Check "Diameter" under the Auto Size section
• Select the rod OD for the concentric mate reference
• Click "Configurator Table..."
• Set the Minimum and Maximum Diameter (4"-12")
• Make a new assembly with a new tube tube with a 6" ID
• Insert the smart component
• Mate it to the ID of the new tube.  It mates, but doesn't autosize.

Edit: I'm using solidworks 2012