bb@baron:~/airdumps$ time aircrack-ng -q -n 64 -f 4 -e WatchingYou airodump.out.cap
   Attack failed. Possible reasons:

     * Out of luck: you must capture more IVs. Usually, 104-bit WEP
       can be cracked with about one million IVs, sometimes more.

     * If all votes seem equal, or if there are many negative votes,
       then the capture file is corrupted, or the key is not static.

     * A false positive prevented the key from being found.  Try to
       disable each korek attack (-k 1 .. 17), raise the fudge factor
       (-f)

real    0m3.575s
user    0m5.417s
sys     0m0.724s
bb@baron:~/airdumps$