You also need to upgrade the ROS to 4.0beta3. Older versions do not support 802.11n cards.
Can you ping the internet from your routerboards? If not, assign then IP addresses to them and put a gateway for that network on your router. We assign private networks to our bridged radio groups and each radio has an IP address in that group. You need that for upgrades and monitoring.
Tom
ok well i worked around this by adding a pppoe client account ...
next question is: you said goto System --> License --> Upgrade key...
i put in my username for
http://www.mikrotik.com and password then i select my license level . i left the server box alone, . but the next option is Pay method ...whatever i select i get an error with...
if i select Credit keys it says :: Not enough Credit keys
if i select deposit it says:: You do not have enough deposit money!
if i select Prepaid keys it says:: Not enough prepaid keys.
how did u resolve this?