diff --git a/src/protocol.cpp b/src/protocol.cpp
index 88c00aed..fc325f97 100755
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -86,10 +86,6 @@ void CProtocol::EnqueueMessage ( CVector<uint8_t>& vecMessage,
 								 const int iCnt,
 								 const int iID )
 {
-
-qDebug("EnqueueMessage start");
-
-
 	// check if list is empty so that we have to initiate a send process
 	const bool bListWasEmpty = SendMessQueue.empty();
 
@@ -104,18 +100,10 @@ qDebug("EnqueueMessage start");
 	{
 		SendMessage();
 	}
-
-qDebug("EnqueueMessage end");
-
-
 }
 
 void CProtocol::SendMessage()
 {
-
-qDebug("SendMessage start");
-
-
 	// we have to check that list is not empty, since in another thread the
 	// last element of the list might have been erased
 	if ( !SendMessQueue.empty() )
@@ -134,10 +122,6 @@ qDebug("SendMessage start");
 		// no message to send, stop timer
 		TimerSendMess.stop();
 	}
-
-qDebug("SendMessage stop");
-
-
 }
 
 void CProtocol::CreateAndSendAcknMess ( const int& iID, const int& iCnt )
@@ -146,10 +130,6 @@ void CProtocol::CreateAndSendAcknMess ( const int& iID, const int& iCnt )
 	CVector<uint8_t>	vecData ( 2 ); // 2 bytes of data
 	unsigned int		iPos = 0; // init position pointer
 
-
-qDebug("CreateAndSendAcknMess start");
-
-
 	// build data vector
 	PutValOnStream ( vecData, iPos, static_cast<uint32_t> ( iID ), 2 );
 
@@ -158,10 +138,6 @@ qDebug("CreateAndSendAcknMess start");
 
 	// immediately send acknowledge message
 	emit MessReadyForSending ( vecAcknMessage );
-
-
-qDebug("CreateAndSendAcknMess end");
-
 }
 
 
@@ -171,21 +147,21 @@ qDebug("CreateAndSendAcknMess end");
 */
 void CProtocol::DeleteSendMessQueue()
 {
-//	Mutex.lock();
-//	{
+	Mutex.lock();
+	{
 		// delete complete "send message queue"
 		SendMessQueue.clear();
-//	}
-//	Mutex.unlock();
+	}
+	Mutex.unlock();
 }
 
 void CProtocol::OnTimerSendMess()
 {
-//	Mutex.lock();
-//	{
+	Mutex.lock();
+	{
 		SendMessage();
-//	}
-//	Mutex.unlock();
+	}
+	Mutex.unlock();
 }
 
 bool CProtocol::ParseMessage ( const CVector<unsigned char>& vecbyData,
@@ -194,15 +170,10 @@ bool CProtocol::ParseMessage ( const CVector<unsigned char>& vecbyData,
 /*
 	return code: true -> ok; false -> error
 */
-
-qDebug("before lock");
+	bool bRet;
 
 	Mutex.lock();
 	{
-
-qDebug("after lock");
-
-
 		int					iRecCounter, iRecID, iData;
 		unsigned int		iPos;
 		CVector<uint8_t>	vecData;
@@ -275,20 +246,22 @@ for ( int i = 0; i < iNumBytes; i++ ) {
 			iOldRecID = iRecID;
 			iOldRecCnt = iRecCounter;
 
-			return true; // everything was ok
+			bRet = true; // everything was ok
 		}
 		else
 		{
-			return false; // return error code
+			bRet = false; // return error code
 		}
 	}
 	Mutex.unlock();
+
+	return bRet;
 }
 
 void CProtocol::CreateJitBufMes ( const int iJitBufSize )
 {
-//	Mutex.lock();
-//	{
+	Mutex.lock();
+	{
 		CVector<uint8_t>	vecNewMessage;
 		CVector<uint8_t>	vecData ( 2 ); // 2 bytes of data
 		unsigned int		iPos = 0; // init position pointer
@@ -307,8 +280,8 @@ void CProtocol::CreateJitBufMes ( const int iJitBufSize )
 
 		// enqueue message
 		EnqueueMessage ( vecNewMessage, iCurCounter, PROTMESSID_JITT_BUF_SIZE );
-//	}
-//	Mutex.unlock();
+	}
+	Mutex.unlock();
 }