Error al montar falso login con Linset

CitarHi... when i try to run the script (as taken off pastebin) I get the error that 'at0' interface is not up.

Do i have to configure this interface before running the script? Seems odd to me because in the 'tables' part of the script, the interface is already scripted to be set up.

[>] Starting: FakeAP_pwn - g0tmi1k

• Setting up FakeAP
  
• Setting up forwarding tables...
  at0: ERROR while getting interface flags: No such device
  SIOCSIFADDR: No such device
  at0: ERROR while getting interface flags: No such device
  SIOCSIFNETMASK: No such device
  SIOCSIFMTU: No such device
  SIOCADDRT: No such process

http://www.backtrack-linux.org/forums/showthread.php?t=19770&page=4

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Buenas.
Queria hacer una pregunta a la comunidad.
Al utilizar la herramienta Linset, todo va correctamente, salvo en la etapa posterior a conseguir el Handshake. Al tratar de establecer el ataque y montar el falso login me aparece el siguiente error:
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Alguien me podria explicar a que se debe?

Muchas gracias.

PD: Me aparece el mismo error tambien con Fluxion.