Manual installation of Rockbox to hifiman hm-601

[Roman-rus]

I carefully made everything described on page: http://www.rockbox.org/wiki/HifimanPort
When I reboot player I can see messages like
"bootloader version...
Loading OK
Executing.."
Then blackscreen and message "No partition found. Insert USB cable and fix it"
When I reboot player with left key pressed, I can start it with official firmware.

Could you please help me how to fix problem with Rockbox execution?

Thanks in advance!