First I would try unplugging SoftStep, closing the software, plugging in SoftStep, re-opening the Software.
If that doesn't solve it, a couple things to check:
If you are using SoftStep in Hosted mode alongside the software:
-In MIDI Monitor, are you monitoring SoftStep Share as your MIDI input port?
-Do you have a Scene selected in SoftStep's software?
-Are the output ports set to SoftStep Share?
-Are Port 1 and Port 2 turned off?
Now a couple questions,
-Are you using SoftStep Software version 1.031?
-Did you plug SoftStep into your computer before you opened the Software?
-Does the Software show interaction with SoftStep (blue rings around keys light up inside software and/or check sensor view)?
Note: If you are using the public beta v1.099, we found a bug when trying to download scenes in Standalone mode under OSX 10.5.x which we have fixed and will include in our next software version about to be released.