diff --git a/gns3/modules/iou/ui/iou_device_configuration_page.ui b/gns3/modules/iou/ui/iou_device_configuration_page.ui
index 96541d897..42478b36c 100755
--- a/gns3/modules/iou/ui/iou_device_configuration_page.ui
+++ b/gns3/modules/iou/ui/iou_device_configuration_page.ui
@@ -92,8 +92,11 @@
      <layout class="QGridLayout" name="gridLayout_2">
       <item row="0" column="0" colspan="2">
        <widget class="QCheckBox" name="uiL1KeepalivesCheckBox">
+        <property name="enabled">
+         <bool>true</bool>
+        </property>
         <property name="text">
-         <string>Enable layer 1 keepalive messages</string>
+         <string>Enable layer 1 keepalive messages (testing only)</string>
         </property>
         <property name="checked">
          <bool>false</bool>
diff --git a/gns3/modules/iou/ui/iou_device_configuration_page_ui.py b/gns3/modules/iou/ui/iou_device_configuration_page_ui.py
index a0df94078..fb664af5c 100644
--- a/gns3/modules/iou/ui/iou_device_configuration_page_ui.py
+++ b/gns3/modules/iou/ui/iou_device_configuration_page_ui.py
@@ -2,7 +2,7 @@
 
 # Form implementation generated from reading ui file '/home/grossmj/workspace/git/gns3-gui/gns3/modules/iou/ui/iou_device_configuration_page.ui'
 #
-# Created: Tue May 20 11:19:36 2014
+# Created: Wed May 21 19:12:10 2014
 #      by: PyQt4 UI code generator 4.10
 #
 # WARNING! All changes made in this file will be lost!
@@ -72,6 +72,7 @@ def setupUi(self, iouDeviceConfigPageWidget):
         self.gridLayout_2 = QtGui.QGridLayout(self.uiAdvancedGroupBox)
         self.gridLayout_2.setObjectName(_fromUtf8("gridLayout_2"))
         self.uiL1KeepalivesCheckBox = QtGui.QCheckBox(self.uiAdvancedGroupBox)
+        self.uiL1KeepalivesCheckBox.setEnabled(True)
         self.uiL1KeepalivesCheckBox.setChecked(False)
         self.uiL1KeepalivesCheckBox.setObjectName(_fromUtf8("uiL1KeepalivesCheckBox"))
         self.gridLayout_2.addWidget(self.uiL1KeepalivesCheckBox, 0, 0, 1, 2)
@@ -156,7 +157,7 @@ def retranslateUi(self, iouDeviceConfigPageWidget):
         self.uiStartupConfigToolButton.setText(_translate("iouDeviceConfigPageWidget", "...", None))
         self.uiConsolePortLabel.setText(_translate("iouDeviceConfigPageWidget", "Console port:", None))
         self.uiAdvancedGroupBox.setTitle(_translate("iouDeviceConfigPageWidget", "Advanced", None))
-        self.uiL1KeepalivesCheckBox.setText(_translate("iouDeviceConfigPageWidget", "Enable layer 1 keepalive messages", None))
+        self.uiL1KeepalivesCheckBox.setText(_translate("iouDeviceConfigPageWidget", "Enable layer 1 keepalive messages (testing only)", None))
         self.uiDefaultValuesCheckBox.setText(_translate("iouDeviceConfigPageWidget", "Use default IOU values for memories", None))
         self.uiRamLabel.setText(_translate("iouDeviceConfigPageWidget", "RAM size:", None))
         self.uiRamSpinBox.setSuffix(_translate("iouDeviceConfigPageWidget", " MB", None))
diff --git a/gns3/modules/vpcs/settings.py b/gns3/modules/vpcs/settings.py
index 008d3ad2e..81d097dbb 100644
--- a/gns3/modules/vpcs/settings.py
+++ b/gns3/modules/vpcs/settings.py
@@ -24,7 +24,7 @@
 
 # default path to Dynamips executable
 if sys.platform.startswith("win"):
-    DEFAULT_VPCS_PATH = "vpcs\vpcs.exe"
+    DEFAULT_VPCS_PATH = r"vpcs\vpcs.exe"
 elif sys.platform.startswith('darwin') and hasattr(sys, "frozen"):
     DEFAULT_VPCS_PATH = os.path.join(os.getcwd(), "../Resources/vpcs")
 else:
diff --git a/gns3/modules/vpcs/vpcs_device.py b/gns3/modules/vpcs/vpcs_device.py
index 06f019912..c05cf67d6 100644
--- a/gns3/modules/vpcs/vpcs_device.py
+++ b/gns3/modules/vpcs/vpcs_device.py
@@ -332,7 +332,6 @@ def addNIO(self, port, nio):
         """
 
         params = {"id": self._vpcs_id,
-                  "slot": port.slotNumber(),
                   "port": port.portNumber(),
                   "port_id": port.id()}
 
@@ -363,8 +362,7 @@ def deleteNIO(self, port):
         """
 
         params = {"id": self._vpcs_id,
-                  "port": port.portNumber(),
-                  "slot": port.slotNumber()}
+                  "port": port.portNumber()}
 
         log.debug("{} is deleting an NIO: {}".format(self.name(), params))
         self._server.send_message("vpcs.delete_nio", params, self._deleteNIOCallback)