RSX Debugger Shows Up Empty, No Matter What Game I Am Playing

After I saw that there was now a way to dump textures using the RSX Debugger, I obviously went to try it out... and whether it was NHL 2K10, NHL 2K8, or NHL 10 I was playing, the outcome was the same; there was no output, as you can see in this screenshot.

   

Are there any settings I need to change to get it working, or would I have to wait until a later update?

Since the log does not mention this, it won't be uploaded.