Just wanted to update that my problem had been solved, and the cause was OS I used with netinstall that is Windows Server 2008. I then mentioned the help section in netinstall, and saw only XP and older OS versions are supported. For more information, I should add that I installed routeros v3.24 via...

Versions other than than 3.24?
http://www.mikrotik.com/download.html

Certainly!
As roc-noc.com told, it may be the version of netinstall used
for now, I used both v3.24 and v4.0beta3 with no luck.
So I need to check other version like v2.9 and ...

Regards

Thanks,

How can I download other versions of netinstall?

Same here, I also formatted the NAND, but the problem existed before formatting. Here is the procedure: I connected my RB450 with direct cable in 3 states: - to a 16 port Switch, which my computer connected too - to ADSL router with 4 LAN ports, which my computer connected too - straight to my compu...