diff --git a/DownloadDCFirmware/update.cpp b/DownloadDCFirmware/update.cpp
index 166c785..b57bbfe 100644
--- a/DownloadDCFirmware/update.cpp
+++ b/DownloadDCFirmware/update.cpp
@@ -209,10 +209,10 @@ bool Update::startBootloader() const {
     return true;
 #else
 
-    int nTry = 5;
+    int nTry = 10;
     while (--nTry >= 0) {
         m_hw->bl_startBL();
-        QThread::msleep(5000);
+        QThread::msleep(1000);
         m_hw->bl_checkBL();
         if (m_hw->bl_isUp()) {
             qInfo() << "starting bootloader...OK";
@@ -220,6 +220,7 @@ bool Update::startBootloader() const {
             return true;
         } else {
             qCritical() << "bootloader not up (" << nTry << ")";
+            qCritical() << "IS BOOTLOADER INSTALLED ???";
         }
     }
     qCritical() << "starting bootloader...FAILED";
@@ -241,7 +242,7 @@ bool Update::stopBootloader() const {
     int nTry = 5;
     while (--nTry >= 0) {
         m_hw->bl_stopBL();
-        QThread::msleep(500);
+        QThread::msleep(1000);
         if (!m_hw->bl_isUp()) {
             qInfo() << "stopping bootloader...OK";
             return true;
@@ -399,6 +400,7 @@ int Update::run() {
         // TODO
         resetDeviceController();
         if (startBootloader()) {
+#if 0
             int currentBlock = 0;
             DownloadResult res = DownloadResult::OK;
             qInfo() << nextTimePoint().toUtf8().constData() << "64-byte block" << currentBlock;
@@ -410,7 +412,7 @@ int Update::run() {
                     } else break;
                 }
             }
-
+#endif
 #if 0
             qCritical() << "DownloadThread::run(): last 64-byte block %04d" << currentBlock;