diff --git a/gns3server/modules/dynamips/__init__.py b/gns3server/modules/dynamips/__init__.py
index 8041e43c..b04aeaa5 100644
--- a/gns3server/modules/dynamips/__init__.py
+++ b/gns3server/modules/dynamips/__init__.py
@@ -269,6 +269,7 @@ class Dynamips(IModule):
         self.delete_dynamips_files()
 
         self._hypervisor_manager = None
+        self._working_dir = self._projects_dir
         log.info("dynamips module has been reset")
 
     def start_hypervisor_manager(self):
diff --git a/gns3server/modules/iou/__init__.py b/gns3server/modules/iou/__init__.py
index 5d267177..ccafe2ee 100644
--- a/gns3server/modules/iou/__init__.py
+++ b/gns3server/modules/iou/__init__.py
@@ -196,6 +196,7 @@ class IOU(IModule):
         self._allocated_udp_ports.clear()
         self.delete_iourc_file()
 
+        self._working_dir = self._projects_dir
         log.info("IOU module has been reset")
 
     @IModule.route("iou.settings")
diff --git a/gns3server/modules/qemu/__init__.py b/gns3server/modules/qemu/__init__.py
index bfdb9258..37998cdc 100644
--- a/gns3server/modules/qemu/__init__.py
+++ b/gns3server/modules/qemu/__init__.py
@@ -124,6 +124,7 @@ class Qemu(IModule):
         self._qemu_instances.clear()
         self._allocated_udp_ports.clear()
 
+        self._working_dir = self._projects_dir
         log.info("QEMU module has been reset")
 
     @IModule.route("qemu.settings")
diff --git a/gns3server/modules/virtualbox/__init__.py b/gns3server/modules/virtualbox/__init__.py
index 4deafe11..49b21e92 100644
--- a/gns3server/modules/virtualbox/__init__.py
+++ b/gns3server/modules/virtualbox/__init__.py
@@ -73,7 +73,7 @@ class VirtualBox(IModule):
                 # look for vboxmanage in the current working directory and $PATH
                 for path in paths:
                     try:
-                        if "vboxmanage" in os.listdir(path) and os.access(os.path.join(path, "vboxmanage"), os.X_OK):
+                        if "vboxmanage" in [s.lower() for s in os.listdir(path)] and os.access(os.path.join(path, "vboxmanage"), os.X_OK):
                             self._vboxmanage_path = os.path.join(path, "vboxmanage")
                             break
                     except OSError:
@@ -152,6 +152,7 @@ class VirtualBox(IModule):
         self._vbox_instances.clear()
         self._allocated_udp_ports.clear()
 
+        self._working_dir = self._projects_dir
         log.info("VirtualBox module has been reset")
 
     @IModule.route("virtualbox.settings")
@@ -742,7 +743,7 @@ class VirtualBox(IModule):
             if not vboxmanage_path or not os.path.exists(vboxmanage_path):
                 raise VirtualBoxError("Could not find VBoxManage, is VirtualBox correctly installed?")
 
-            command = [self._vboxmanage_path, "--nologo", "list", "vms"]
+            command = [vboxmanage_path, "--nologo", "list", "vms"]
             result = self._execute_vboxmanage(command)
         except VirtualBoxError as e:
             self.send_custom_error(str(e))
diff --git a/gns3server/modules/virtualbox/virtualbox_vm.py b/gns3server/modules/virtualbox/virtualbox_vm.py
index eb419986..5e5660a9 100644
--- a/gns3server/modules/virtualbox/virtualbox_vm.py
+++ b/gns3server/modules/virtualbox/virtualbox_vm.py
@@ -740,8 +740,7 @@ class VirtualBoxVM(object):
 
         for adapter_id in range(len(self._ethernet_adapters), self._maximum_adapters):
             log.debug("disabling remaining adapter {}".format(adapter_id))
-            self._modify_vm("--cableconnected{} off".format(adapter_id + 1))
-            self._modify_vm("--nic{} null".format(adapter_id + 1))
+            self._modify_vm("--nic{} none".format(adapter_id + 1))
 
     def _create_linked_clone(self):
 
diff --git a/gns3server/modules/vpcs/__init__.py b/gns3server/modules/vpcs/__init__.py
index adb121a6..aa0f216e 100644
--- a/gns3server/modules/vpcs/__init__.py
+++ b/gns3server/modules/vpcs/__init__.py
@@ -140,6 +140,7 @@ class VPCS(IModule):
         self._vpcs_instances.clear()
         self._allocated_udp_ports.clear()
 
+        self._working_dir = self._projects_dir
         log.info("VPCS module has been reset")
 
     @IModule.route("vpcs.settings")
diff --git a/setup.py b/setup.py
index 1255b7ad..1b84a390 100644
--- a/setup.py
+++ b/setup.py
@@ -48,6 +48,8 @@ setup(
         "tornado>=3.1",
         "pyzmq>=14.0.0",
         "jsonschema>=2.3.0"
+        "apache-libcloud>=0.14.1",
+        "requests",
     ],
     entry_points={
         "console_scripts": [