How do I parameterize my FSM's StateData?

gistfile1.txt

object NeuroCon {
  sealed trait StateName
  object ReadyState extends StateName
  object ProcState extends StateName

  sealed trait StateData
  case class ReadyData(net: ActorRef) extends StateData
  case class ProcData(net: ActorRef, task: ActorRef, env: TaskEnv) extends StateData
}

import NeuroCon._
class NeuroCon[TaskEnv, TaskAct](sensorArray: (TaskEnv) => StimVec, topTpl: TopTpl, actuatorArray: (TaskEnv, RespVec) => TaskAct) extends Actor with LoggingFSM[StateName, StateData] {

  startWith(ReadyState, ReadyData(context.actorOf(Props(new Network(topTpl)))))
}