cant mount with torus on google container engine

[amitgilad3]

Hi ,
I have followed all the steps to install torus on gce but i keep getting the following error when i try to mount my pod
FailedMount MountVolume.SetUp failed for volume "coreos.com/torus/0475279a-e967-11e6-a458-42010a80005a-data" (spec.Name: "data") pod "0475279a-e967-11e6-a458-42010a80005a" (UID: "0475279a-e967-11e6-a458-42010a80005a") with: attach command failed, status: Failure, reason: Launch helper exited with unknown return code 1

any idea why ???