Hello all: i try to using "iwpriv wlan0 set_rid_word 64688 2" to set short preamble in hostap-0.0.2. but in my station(cisco 350 card),it still connects with long preamble. anything i miss,or ??? and can NAI sniffer or some tools can verify the preamble type?? I would appreciate your any information,thank you. spark