Pues nada no me funciona, os dejo lo que me tira el wepcrackgui, saludos..
46:24:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/F8:1A:67:7A:26:F7-06.cap
0:46:24:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/F8:1A:67:7A:26:F7-04.cap
0:46:24:Debug:Scan exited
0:46:24:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/F8:1A:67:7A:26:F7-03.cap
0:46:24:Debug:Starting:airodump-ng mon0
0:46:24:Debug:Started monitor on:mon0
0:46:24:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/F8:1A:67:7A:26:F7-02.cap
0:46:24:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/9C:80:DF:27:D0:C0-03.cap
0:46:24:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/9C:80:DF:27:D0:C0-02.cap
0:46:23:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/9C:80:DF:27:D0:C0-01.cap
0:46:23:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/64:68:0C:B3:B0:01-02.cap
0:46:23:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/64:68:0C:B3:B0:01-01.cap
0:46:23:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/64:68:0C:0B:EA:06-03.cap
0:46:23:Debug:Starting:aircrack-ng /usr/lib/wepcrack/captures/64:68:0C:0B:EA:06-01.cap
0:46:23:Debug:Starting: WepCrack.Controller.InterfacesController
0:46:23:Debug:Trying to enable monitor on:wlan0 Driver:ath9k
0:46:23:Debug:Starting: WepCrack.Controller.StatisticController
0:46:23:Debug:Starting: WepCrack.Controller.ScanController
0:46:23:Debug:Starting: WepCrack.Controller.AccessPointController
0:46:22:Debug:Got Description for wlan0: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
0:46:22:Debug:Running: WepCrack.Controller.MainController