Weird problem

Several years ago, I was very active in robocode and may have screwed around with it a bit (not really sure anymore). Now, I've come back to find robocode behaving very weirdly. When I use the default robocode editor to make a new robot, save and compile it, the compiled .class file appears in the .robocode/robots directory in the appropriate package. However, when I make a new battle, neither the robot or its package show up (even after refreshing). When I removed some of the older bots already in the directory and refreshed the robot list, however, they were also removed from the robot list (Wierd, huh? It's almost like it ignores any new packages). I tried deleting the .robocode directory and retrying everything, but the result didn't change.