diff --git a/src/channel.cpp b/src/channel.cpp
index d5854889..389bb23b 100755
--- a/src/channel.cpp
+++ b/src/channel.cpp
@@ -225,12 +225,22 @@ CChannel::CChannel ()
 
 void CChannel::SetSockBufSize ( const int iNewBlockSize, const int iNumBlocks )
 {
-	/* this opperation must be done with mutex */
+	/* this opperation must be done with mutex */
+
+qDebug ( "before lock" );
+
 	Mutex.lock ();
 
 	SockBuf.Init ( iNewBlockSize, iNumBlocks );
+
+qDebug ( "in lock" );
+
 
 	Mutex.unlock ();
+
+
+qDebug ( "after lock" );
+
 }
 
 void CChannel::OnJittBufSizeChange ( int iNewJitBufSize )