Okay! actually this error was cause by a mistake on my part and one of my programmers found this when he was trying to use it as well.. i apparently didn't update the jRIO jar file in the latest update.. please refer to this version of jRIO now... the issue was that it wasn't properly extending IterativeRobot/SimpleRobot etc because it wasn't looking for it in the right sourcepackage...
...Sorry about that :c
(NOTE... I just found another error with RobotDrive where the arcade drive method was accidently capitalized... I am fixing this now)
jRIO