CM3 cannot boot from emmc

I have a RADXA CM3 and its IO board. I install the image to EMMC through RKDevTool according to the steps of the official document. The RKDevTool displays that the installation is successful. But when I plug the power and boot the system, there is no response. There is no other light on the IO board except a blue light. There is also no light on cm3.
Before, I installed the image on the SD card, I could enter the system. It seems that cm3 is not booted from the system on EMMC.
Thank you for telling me how to solve it.