diff --git a/lr4.py b/lr4.py
index 3251f9e..98f5b10 100755
--- a/lr4.py
+++ b/lr4.py
@@ -77,7 +77,9 @@ def getDevice(serialNum=None):
   '''
   def __init__(self,dev):
     self.usbDevice=dev
+    #configuration stuffs...
     self.usbDevice.reset()
+    self.usbDevice.set_configuration()
     if(self.usbDevice.is_kernel_driver_active(LR4.INTERFACE_NUM)):
       self.usbDevice.detach_kernel_driver(LR4.INTERFACE_NUM)
     self._readConfig()