[ns] wimax code problem

[Muhammad Muneer]

hi im simulating wimax code
and this eror occurs
can anybody help me plz?
how can i resolv this issue?



invalid command name "Agent/WimaxCtrl"
   while executing
"Agent/WimaxCtrl set adv_interval_ 1.0"


invalid command name "Phy/WirelessPhy/OFDM"
   while executing
"Phy/WirelessPhy/OFDM create _o37 "


i think these lines contain error
but how to resolv it i don know
plz help me

*set opt(netif)          Phy/WirelessPhy/OFDM       ;# network interface
type



set wimaxctrl [new Agent/WimaxCtrl]
$wimaxctrl set-mac [$bstation set mac_(0)]
*