Hi all. Have an RB1100AHx2

Have installed RouterOS by Netinstall correctly (by putty changed boot to ethernet and then again boot from NAND).

RB restatrs but never boots up, I can see this error:

RouterBOOT backup booter 3.10

RouterBoard 1100AHx2

CPU frequency: 1066 MHz
Memory size: 2048 MiB
NAND size: 128 MiB

Press any key within 2 seconds to enter setup..
Please, check ethernet cable...
Ethernet link absent...
(I press ENTER and then continues)
trying bootp protocol.................

And all time reboots but never boots up.

The only way to make it boot is plugin and ether cable on ether13 (POE/BOOT). But, why? Boot device is set only from NAND. When boots, I can see error:

trying bootp protocol......................................................................................................................................................................................................................................................................................................... failed
kernel loading failed

loading from nand... ok
setting up elf image... ok
jumping to kernel code
Starting...
Resetting system configuration...
Generatting SSH DSA key...
Starting services...
Mikrotik 6.23
MikroTik Login:

On Putty:

RouterBOOT backup booter 3.10

RouterBoard 1100AHx2

CPU frequency: 1066 MHz
Memory size: 2048 MiB
NAND size: 128 MiB

Press any key within 2 seconds to enter setup..
Please, check ethernet cable... (and is there all time if I don't press ENTER or plug an ether cable on ether13)
(when I press ENTER)
Ethernet link absent...
trying bootp protocol.................
(reboots)

RouterBOOT backup booter 3.10

RouterBoard 1100AHx2

CPU frequency: 1066 MHz
Memory size: 2048 MiB
NAND size: 128 MiB

Press any key within 2 seconds to enter setup..
Please, check ethernet cable... (and is there all time if I don't press ENTER or plug an ether cable on ether13)
(I plug an ether cable on ether13)
trying bootp protocol........................................................................................................................................................................................................... failed
kernel loading failed

loading kernel from nand... OK
setting up elf image... OK
jumping to kernel code
Starting...
Resetting system configuration...
Generating SSH DSA key...
Starting services...
MikroTik 6.23
MikroTik Login:

When boots (allways with an ether cable plugged on ether13) RB1100AHx2 seems to work OK. I make my own config, but when I make a rebbot (not system reset-configuration) or a shutdown, then RB1100AHx2 boots up but it's on default...