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Master control don't work and flash board

I try to follow devzone.nordicsemi.com/.../

but on the paragraph Using the nRF51 Dongle I always receive "No response from master emulator " also after flash the board

If help after the flash error LED1 LED2 and LED3 stay turned on fixed

image description

And now If I try to upload new program I obtain

Error: Flash Download failed - "Cortex-M0"

Can you help me?

this is the log

121;17:55:41.2816 [xxxxxxxxxx][MainThread] HciH4Driver closed
122;17:55:42.6174 [xxxxxxxxxx][MainThread] nrfjprog.dll 5.2.0.45231
123;17:55:42.6194 [xxxxxxxxxx][MainThread] HciJLinkDriver opened (COM6, 1000000-8-None-1-RequestToSend)
124;17:55:42.6204 [xxxxxxxxxx][MainThread] JLinkARM.dll 4.92
125;17:55:42.6274 [xxxxxxxxxx][MainThread] xxxxxxxxxx - COM6
126;17:55:43.5802 [xxxxxxxxxx][MainThread] HCI command: BTLE_CMD_READ_BD_ADDR
127;17:55:43.5802 [xxxxxxxxxx][MainThread] Serial port write: 01-09-10-00
128;17:55:43.5802 [xxxxxxxxxx][MainThread] Waiting for event packet. Timeout is 500ms
129;17.55.43.8863 [xxxxxxxxxx][ScriptThread]  - - Start of script: (2015-03-15 16:55:43) - - 
130;17.55.43.9233 [xxxxxxxxxx][ScriptThread] HCI command: BTLE_CMD_READ_BD_ADDR
131;17.55.43.9253 [xxxxxxxxxx][ScriptThread] Serial port write: 01-09-10-00
132;17:55:44.0936 [xxxxxxxxxx][MainThread] Finished waiting for event packet. PacketReceived:False
133;17:55:44.0946 [xxxxxxxxxx][MainThread] InitAddressAndFirmware, exception: No command complete event received. System.TimeoutException: No command complete event received.
   in Ulpbt.Hci.WaitAndCheckCmdCompleteEvent(btle_cmd_opcode_t opcode)
   in Ulpbt.Hci.HciReadPublicDeviceAddress()
   in LEControlPanel.frmLEControl.InitDeviceAddress()
   in LEControlPanel.frmLEControl.InitAddressAndFirmware()
134;17.55.45.3433 [xxxxxxxxxx][ScriptThread] Could not read public device address: No response from master emulator
135;17.55.45.3433 [xxxxxxxxxx][ScriptThread] No response from master emulator.

Fabio

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