Netinstall : MAC Address troubles

Hello,
I have been formatting the NAD of my routerBOARD.
Well, now the problems is:

Using RouterBOOT booter still running on my RouterBoard192 (with boot device:= e - boot over Ethernet) RouterBoard is attempting to boot to the NetInstall program.
Unfortunatly, the NetInstall program does probably not gives the RouterBoard the IP address i’ve entered at Step 4 (http://wiki.mikrotik.com/wiki/Netinstall), and anyway i could not see the MAC Address of the RouterBoard appear in the Routers/Drives list of the NetInstall program. So i could’nt start the software installation into my routerBOARD directly connected on my ethernet port.
(Of course, Ip settings are correct and Netinstall’s Boot server si enabled.)

Any help is appreciated.

PS: see below console output:

—BEGIN—
RouterBOOT booter 2.12
RouterBoard 192
CPU frequency: 175 MHz
Memory size: 32 MB
Press any key within 2 seconds to enter setup..
trying bootp protocol…

—END—

Check your host firewall. Ensure you’re running the app as admin on recent Windows versions so you have rights to tie to ports under 1024

Well… i found the solution : just adding a static map in ARP cache, in aim to bind RB ether1 Mac address to the “client” of Netinstall tftp server.
exemple :

arp -s 192.168.88.1 00-02-60-b4-09-df

Everything"s allright now.