Hello. We have problems with two XDC2460. After we tried to upgrade the firmware we cant access the controllers. Dont know what happened, maybe the files where corrupted. I have tried to download new firmware with roborun+, different version of dfuloader on 2 laptops. No contact at all eather with serial or usb. When i try to download with roborun+, it says its connected but its not. It dosent matter if the controller is connected, its the same message. The led indicators shows: power steady green, status flashes red 1 sec, then steady green and usb is off. Is there any way to load a new software???