You\\\'re trying to run an i386 binary on a device with an ARM processor [N900]. This won\\\'t work. If you have \"file\" installed, file ./wlan_radar could probably confirm this.

What does confuse me, however, is that:
* You\\\'ve installed a deb; so why are you trying to run it with ./? That would suggest that you have installed an armel deb, with its armel binary in /usr/bin(?), but are trying to run an i386 binary copied separately.

(Of course, the other theory could be that you have forcibly set the Archtecture in debian/control to armel, built it in FREMANTLE_X86, and are in /usr/bin trying to run the program...)