NetInstall problem installing RouterOS on RB2011

Hi!
I need some help…
I’m trying to install the RouterOS in a RB2011, with this manual:

https://wiki.mikrotik.com/wiki/Manual:Netinstall#NetInstall_Example

I’m having problem:


RouterBOOT backup booter 3.22

load

RouterBoard 2011UiAS-2HnDnel not found

CPU frequency: 600 MHz
Please, check
Memory speed: 200 MHz
Memory size: 128 MiBcol…
Memory speed: 200 MHz
Memory size: 128 MiB
NAND size: 128 MiB

Press any key within 9 seconds to enter setup…

loading kernel from nand… kernel not found
trying bootp protocol… failed
kernel loading failed

Can anyone help me?

Thanks!