The panel cannot cnnnect to the device

1.Problem description:The panel in the processing preview cannot connected to the device after downloading graphics to the mainboard for RDC6442 board card.The mainborad model is 8.00.8 and the software model is V8.0.20.
2.Possible cause analysis of failure:
a.Error updating file.
b.The software version is too low.
3.Solutions:Re-upgrade the version files and software to the latest version 8.00.22,8.00.23 or above.