system cant ping radio

i have this strange problem and need some help. I have a client who connects to my rb112 with an Edimax 65mw outdoor radio.when his PC is connected to the Edimax, i cant ping its ip address, with the connection to the poe right, and even the cables crimped properly.What seems to be the problem?please i need help badly, thanks.

what about your PC firewall? have you check firewall not installed on that PC? or have you check ping from PC to RB?