diff --git a/rdpy/protocol/rdp/pdu/lic.py b/rdpy/protocol/rdp/pdu/lic.py
index 557c1d9..82715b0 100644
--- a/rdpy/protocol/rdp/pdu/lic.py
+++ b/rdpy/protocol/rdp/pdu/lic.py
@@ -22,12 +22,10 @@
 @see: http://msdn.microsoft.com/en-us/library/cc241880.aspx
 """
 
-from rdpy.network.type import CompositeType, UInt8, UInt16Le, UInt32Le, String, sizeof, FactoryType, ArrayType,\
-    Stream
+from rdpy.network.type import CompositeType, UInt8, UInt16Le, UInt32Le, String, sizeof, FactoryType, ArrayType, Stream
 from rdpy.base.error import InvalidExpectedDataException
 import rdpy.base.log as log
-import rdpy.protocol.rdp.sec as sec
-import rdpy.protocol.rdp.rc4 as rc4
+import sec, rc4
 
 class MessageType(object):
     """
diff --git a/rdpy/protocol/rdp/rc4.py b/rdpy/protocol/rdp/pdu/rc4.py
similarity index 100%
rename from rdpy/protocol/rdp/rc4.py
rename to rdpy/protocol/rdp/pdu/rc4.py
diff --git a/rdpy/protocol/rdp/sec.py b/rdpy/protocol/rdp/pdu/sec.py
similarity index 100%
rename from rdpy/protocol/rdp/sec.py
rename to rdpy/protocol/rdp/pdu/sec.py
diff --git a/rdpy/protocol/rdp/x224.py b/rdpy/protocol/rdp/x224.py
index bf2f9bf..6e0becb 100644
--- a/rdpy/protocol/rdp/x224.py
+++ b/rdpy/protocol/rdp/x224.py
@@ -201,6 +201,10 @@ class Client(X224Layer):
         else:
             self._selectedProtocol = Protocols.PROTOCOL_RDP
         
+        #NLA protocol doesn't support in actual version of RDPY
+        if self._selectedProtocol in [ Protocols.PROTOCOL_HYBRID, Protocols.PROTOCOL_HYBRID_EX ]:
+            raise InvalidExpectedDataException("RDPY doesn't support NLA security Layer")
+        
         if message.protocolNeg.failureCode._is_readed:
             log.info("negotiation failure code %x"%message.protocolNeg.failureCode.value)
 
diff --git a/test/test_protocol_rdp_x224.py b/test/test_protocol_rdp_x224.py
index 69f018e..491f270 100644
--- a/test/test_protocol_rdp_x224.py
+++ b/test/test_protocol_rdp_x224.py
@@ -96,9 +96,6 @@ class X224Case(unittest.TestCase):
                 
                 if t.protocolNeg.code != x224.NegociationType.TYPE_RDP_NEG_REQ:
                     raise X224Case.X224_FAIL()
-                
-                if t.protocolNeg.selectedProtocol.value != x224.Protocols.PROTOCOL_SSL:
-                    raise X224Case.X224_FAIL()
             
         def nextAutomata(data):
             raise X224Case.X224_PASS()
@@ -108,33 +105,7 @@ class X224Case(unittest.TestCase):
         layer.recvConnectionConfirm = nextAutomata
         layer.connect()
         
-        self.assertRaises(X224Case.X224_PASS, layer.recv, type.String('\x01\x02'))
-    
-    def test_x224_client_recvConnectionConfirm_negotiation_old(self):
-        """
-        @summary:  unit test for X224Client.recvConnectionConfirm and sendConnectionRequest function
-                    whithout protocol negotiation (doesn't support)
-        """
-        message = x224.ServerConnectionConfirm()
-        del message._typeName[message._typeName.index("protocolNeg")]
-        s = type.Stream()
-        s.writeType(message)
-        s.pos = 0
-        layer = x224.Client(None)
-        self.assertRaises(error.InvalidExpectedDataException, layer.recvConnectionConfirm, s)
-    
-    def test_x224_client_recvConnectionConfirm_negotiation_failure(self):
-        """
-        @summary:  unit test for X224Client.recvConnectionConfirm and sendConnectionRequest function
-                    check negotiation failure
-        """
-        message = x224.ServerConnectionConfirm()
-        message.protocolNeg.code.value = x224.NegociationType.TYPE_RDP_NEG_FAILURE
-        s = type.Stream()
-        s.writeType(message)
-        s.pos = 0
-        layer = x224.Client(None)
-        self.assertRaises(error.InvalidExpectedDataException, layer.recvConnectionConfirm, s)
+        self.assertRaises(X224Case.X224_PASS, layer.recv, type.String('\x01\x02'))  
         
     def test_x224_client_recvConnectionConfirm_negotiation_bad_protocol(self):
         """
@@ -142,7 +113,7 @@ class X224Case(unittest.TestCase):
                     Server ask another protocol than SSL
         """
         message = x224.ServerConnectionConfirm()
-        message.protocolNeg.selectedProtocol.value = x224.Protocols.PROTOCOL_RDP
+        message.protocolNeg.selectedProtocol.value = x224.Protocols.PROTOCOL_HYBRID
         s = type.Stream()
         s.writeType(message)
         s.pos = 0