I'm using backtrack 3 because bt4 is too big for my CDs. Anyway, whenever I use the konsole some things don't work, like if i spoof my mac address then I can't use airodump and vice versa. but sometimes they both work but not very often. The rest seem to be random. Whenever an application opens and has the certain error it just says "-bash: /usr/local/sbin/airodump-ng: cannot execute binary file"

the chipset is Ralink b /g and the driver is rt2500