athn0: radio is disabled by hardware switch
Does your laptop have a switch that disables your 802.11 card? My Thinkpad has a little slider switch, which will disable the wireless card regardless of any software-based configuration I do. If you have an LCD indicating that your wireless card is "on" or transmitting, confirm that it is the correct color (amber, green, orange, etc.) and state (solid, blinking or off). Please refer to your manual for this information.
Also: More information regarding your client's operating system, platform, your access point, etc, would be useful.
Please read the How to Ask and the FAQ as well... good quality questions are just as important to SeverFault as good quality answers... and we're (or at least most of us are) certainly more charitable than OpenBSD-misc.