diff --git a/js/stm32dfu.js b/js/stm32dfu.js
index a8465a64..8abddc7a 100644
--- a/js/stm32dfu.js
+++ b/js/stm32dfu.js
@@ -374,26 +374,8 @@ STM32DFU_protocol.prototype.upload_procedure = function(step) {
 
                     setTimeout(function() {
                         if (data[4] != self.state.dfuUPLOAD_IDLE) {
-                            self.controlTransfer('out', self.request.DNLOAD, 0, 0, 0, [0x21, address, (address >> 8), (address >> 16), (address >> 24)], function(result) { // problem on this call !!
-                                self.controlTransfer('in', self.request.GETSTATUS, 0, 0, 6, 0, function(data) {
-                                    if (data[4] == self.state.dfuDNBUSY) {
-                                        var delay = data[1] | (data[2] << 8) | (data[3] << 16);
-
-                                        setTimeout(function() {
-                                            self.controlTransfer('in', self.request.GETSTATUS, 0, 0, 6, 0, function(data) {
-                                                if (data[4] == self.state.dfuDNLOAD_IDLE) {
-                                                    clear_status();
-                                                } else {
-                                                    console.log(data);
-                                                }
-                                            });
-                                        }, delay);
-                                    } else if (data[4] == self.state.dfuUPLOAD_IDLE) {
-                                        read();
-                                    } else {
-                                        console.log(data);
-                                    }
-                                });
+                            self.loadAddress(address, function() {
+                                clear_status();
                             });
                         } else {
                             clear_status(function() {