Please note, that loaders can be not suitable for connecting the device. This depends on device CPU bootrom revision. For example, some LS991 can be connected using loaders from Software and some аrе not connected:
http://forum.gsmhosting.com/vbb/f664...d-usb-2161902/,
http://forum.gsmhosting.com/vbb/f798...table-2162110/.
In the latest Software version (1.2.6), we have added checking loader compatibility for device. Please install the latest Medusa Pro Software version 1.2.6 (
Medusa Box Downloads - Software, Drivers, Manual), try to connect your phone again and post here full Software log.