blaupunk sl04 frp

Blaupunkt sl04 frp error!

Using library Brom_DLL_v7.1733.4
Searching phone in normal mode;
[connect the phone powered off to the usb cable]
Phone detected (MediaTek PreLoader USB VCOM (Android) (COM3))
Preparing to start flash mode;
Preparing to open COM3
Connecting;
Downloading DA;
Initializing;
ERROR: Connection failed !
ERROR: BOOT_PHONE;