ssh key rejected on ec2 eu-west-1

mail.clj

(ns mail
  (:use [pallet.utils :only [make-user]]
        [pallet.crate.automated-admin-user :only [automated-admin-user]]
        [pallet.phase :only [phase-fn]]
        [pallet.core :only [server-spec group-spec converge]]
        [pallet.compute :only [compute-service-from-config-file]]))

(def my-admin-user (make-user "superuser"
                              :public-key-path "/path/to/public"
                              :private-key-path "/path/to/private"))

(def svc (compute-service-from-config-file))

(defn with-admin [admin-user]
  (server-spec
   :phases {:bootstrap (phase-fn
                        (automated-admin-user (:username admin-user)
                                              (:public-key-path admin-user)))}))

;; This group works fine
(defn converge-in-us-east []
  (converge {(group-spec "berras"
                         :extends [(with-admin my-admin-user)]) 1}
            :compute svc
            :user my-admin-user))

;; In this group I cannot login using the ssh-keypair specified above
(defn converge-in-eu-west []
  (converge {(group-spec "berras"
                         :extends [(with-admin my-admin-user)]
                         :location {:location-id "eu-west-1"}) 1}
            :compute svc
            :user my-admin-user))