how to enable iwpriv command

Hi,

i am working in beagle board and Angstrom 2008.1 distribution.

i need to test the wlan.For that some commands needs to be excute like
iwpriv,iwconfig,etc.

but if i use these commands i got the below error.

-sh: iwpriv: not found

how can we enable these commands in this kernel and where have to
enable it?

please help me to solve this issue.