ntop ettercap help!!

i cant run them i get --
ppp0: Device not configured
and
ec_Inet_macosx:379 ioctl(BIOCSETIF) | ERRNO : 6 | Device not configured
pplz somebody help me

sounds like you're trying to run it when you don't have a network connection. or it's looking to use a network connection you're not using [ppp?]