diff --git a/udprecvqueue.cpp b/udprecvqueue.cpp
index b312c32..6799944 100644
--- a/udprecvqueue.cpp
+++ b/udprecvqueue.cpp
@@ -30,15 +30,27 @@ UdpRecvQueue::~UdpRecvQueue()
 bool UdpRecvQueue::recvUdp(unsigned int index, const void *data, int size) {
 	confirmRequired = true;
 	
-	if (size < 0 || size > PACKET_SIZE)
+	if (size < 0 || size > PACKET_SIZE) {
+		DebugMsg("%u, %u, %d bad size", connection.id.id, index, size);
 		return false;
-	if (cycleLess(index, currentIndex) || !cycleLess(index, currentIndex + PACKETS_COUNT))
+	}
+	if (cycleLess(index, currentIndex)) {
+		DebugMsg("%u, %u, %d already received and processed", connection.id.id, index, size);
+		return false;
+	}
+	if (!cycleLess(index, currentIndex + PACKETS_COUNT)) {
+		DebugMsg("%u, %u, %d index is outside from reserved buffer space", connection.id.id, index, size);
 		return false;
-	if (finalEntryAdded && !cycleLess(index, endIndex))
+	}
+	if (finalEntryAdded && !cycleLess(index, endIndex)) {
+		DebugMsg("%u, %u, %d behind the last", connection.id.id, index, size);
 		return false;
+	}
 	Entry &e = entries[(current + (index - currentIndex))%PACKETS_COUNT];
-	if (e.received)
+	if (e.received) {
+		DebugMsg("%u, %u, %d already received", connection.id.id, index, size);
 		return false;
+	}
 	
 	DebugMsg("%u, %u, %d", connection.id.id, index, size);
 	e.received = true;