1)Install aircrack from the repo:
ihackmyi.com/cydia
2) Set EVERY files' permission to 777
3) Open Terminal in WinSCP from /var/
4) enter the following command:
sysctl -w security.mac.proc_enforce=0 security.mac.vnode_enforce=0 /aircrack

5) Go to iPod touch/ iPhone and open Mobile Terminal

6)Type the following code to activate on the device:
/var/aircrack/aircrack-ng -a 1 /var/aircrack/touch.ivs

Good Luck!

/var/aircrack/aircrack-ng =the file terminal will open,
 -a 1 = the type of encrytption, that is wep,
/var/aircrack/touch.ivs = where the packets are saved, this is simply a sample file as it can't capture new packets yet.