Ensime debug with jdb not loading project classes

I'm using Ensime for an sbt project. When I run ensime-db-start in a unit test under src/test/scala/<pkg>.../Myclass.scala I cannot set a breakpoint and then I immediately get a ClassNotFoundException:

VM Started: 
Exception occurred: java.lang.ClassNotFoundException (uncaught)"thread=main", java.net.URLClassLoader$1.run(), line=202 bci=73

Issuing classpath afte开发者_StackOverflowr this error shows that the class is in the classpath.

On a related note I also cannot set a breakpoint before issuing the run command using the C-c C-d b sequence. I get

could not find class information for given permission

Perhaps I'm not understanding how Ensime is launching the JVM - any pointers appreciated.

I can run unit test fine from within sbt and I can run a class fine from under src/main/scala/...

I am using ensime 0.10.1 and jdk 1.6.0_26.

import sbt._
import Keys._

object BuildSettings {
  val buildOrganization = "bmf"
  val buildVersion      = "1.0.0"
  // val buildScalaVersion = "2.9.0-1"

  val buildSettings = Defaults.defaultSettings ++ Seq (
    organization := buildOrganization,
    version      := buildVersion
  )
}


object MyBuild extends Build
{
   import BuildSettings._

   val junitdep = "junit" % "junit" % "4.8" % "test"
   val scalatestdep = "org.scalatest" % "scalatest" % "1.3" % "test"
   val commonDeps = Seq(junitdep, scalatestdep)
   javacOptions += "-g"

   lazy val common = Project (
    "main",
    file ("."),
    settings = buildSettings ++ Seq (libraryDependencies ++= commonDeps)
  )

}