diff --git a/spectrum/src/sample.cfg b/spectrum/src/sample.cfg
index 730060b46ad4c49bf3bf2cea0c0655a14b6dfaea..a23a46a732bee4b5987b0fa8d5f0702edd45cd10 100644
--- a/spectrum/src/sample.cfg
+++ b/spectrum/src/sample.cfg
@@ -11,7 +11,8 @@ admin_password=test
 #cert=server.pfx #patch to PKCS#12 certificate
 #cert_password=test #password to that certificate if any
 users_per_backend=10
-backend=/home/hanzz/code/libtransport/backends/libpurple/spectrum2_libpurple_backend
+#backend=/home/hanzz/code/libtransport/backends/libpurple/spectrum2_libpurple_backend
+backend=/usr/bin/mono /home/hanzz/code/networkplugin-csharp/msnp-sharp-backend/bin/Debug/msnp-sharp-backend.exe
 #backend=/home/hanzz/code/libtransport/backends/frotz/spectrum2_frotz_backend
 #backend=../../backends/libircclient-qt/spectrum2_libircclient-qt_backend
 #protocol=prpl-msn
diff --git a/src/BlockSerializer.cpp b/src/BlockSerializer.cpp
index 586e229864fcd3fedbbf709359116957ebd7acd7..0a28bc85c5300e12805d1d1c9e30ff2d01ec30ef 100644
--- a/src/BlockSerializer.cpp
+++ b/src/BlockSerializer.cpp
@@ -16,7 +16,7 @@ namespace Transport {
 
 // This payload is NOT part of ANY XEP and it is only
 // libtransport related extension.
-BlockSerializer::BlockSerializer() : GenericPayloadSerializer<BlockPayload>() {
+BlockSerializer::BlockSerializer() : Swift::GenericPayloadSerializer<BlockPayload>() {
 }
 
 std::string BlockSerializer::serializePayload(boost::shared_ptr<BlockPayload> attention)  const {
diff --git a/src/rostermanager.cpp b/src/rostermanager.cpp
index 5f397ba8dea43150d32d1397cac7d45208b00ad8..945becd3d997caf7210021517c86adecf66a9cd7 100644
--- a/src/rostermanager.cpp
+++ b/src/rostermanager.cpp
@@ -182,9 +182,13 @@ void RosterManager::storeBuddy(Buddy *buddy) {
 }
 
 void RosterManager::handleBuddyRosterPushResponse(Swift::ErrorPayload::ref error, Swift::SetRosterRequest::ref request, const std::string &key) {
+	LOG4CXX_INFO(logger, "handleBuddyRosterPushResponse called for buddy " << key);
 	if (m_buddies[key] != NULL) {
 		m_buddies[key]->handleBuddyChanged();
 	}
+	else {
+		LOG4CXX_WARN(logger, "handleBuddyRosterPushResponse called for unknown buddy " << key);
+	}
 
 	m_requests.remove(request);
 	request->onResponse.disconnect_all_slots();