diff --git a/pglab/QueryTool.cpp b/pglab/QueryTool.cpp
index a952a1b..8c66760 100644
--- a/pglab/QueryTool.cpp
+++ b/pglab/QueryTool.cpp
@@ -307,6 +307,9 @@ void QueryTool::connectionStateChanged(ASyncDBConnection::State state)
 	QString iconname;
 	switch (state) {
 	case ASyncDBConnection::State::NotConnected:
+		startConnect();
+		iconname = "red.png";
+		break;
 	case ASyncDBConnection::State::Connecting:
 		iconname = "red.png";
 		break;
diff --git a/pglablib/ASyncDBConnection.cpp b/pglablib/ASyncDBConnection.cpp
index 2367595..d518ab7 100644
--- a/pglablib/ASyncDBConnection.cpp
+++ b/pglablib/ASyncDBConnection.cpp
@@ -465,6 +465,8 @@ void ASyncDBConnection::setupConnection(const ConnectionConfig &config)
 		m_threadData->stop();
 		m_thread.join();
 	}
+
+	m_threadData.reset(new ASyncDBConnectionThread(this));
 	m_threadData->m_config = config;
 	m_thread = std::thread([this] () { m_threadData->run(); });