Problem with persistent live usb

[smartyx99]

Hi,to all the EXPERTS
I have a usb wifi Asus 167G v2...device.
airmon-ng
Interface Chipset Driver
rausb0 Ralink 2573 USB rt73

I successfully created the persistent usb using the tutorial Backtrack 4 USB Install - Offensive Security
Successfully installed the driver rt73 after moving rt73.ko.It scanned for the APs.

Now i wanted to test whether the changes have made are permanent or not i reeboted the pc....now i see that the files created by me and by the rt73 installation are there but when i type "iwconfig" i dont see "rausb0" interface Why does it happened.
Further to test the cracking i ran the cd and tried to crack my own wifi. Distance from usb wifi was about 1 feet.
Details: (after running it for more than 45 minutes)
PWR RXQ Beacons #Data, #/s CH MB ENC

86 22 2766 0 0 11 54 WEP
Notice the data is still 0 after so long time
Also didnt get ARP instead got ths msg
You should also start airodump-ng to capture replies.
read failed: Network is down requests and 0 ACKs), sent 0 packets...(0 pps)
wi_read(): Illegal seek

So two questions from rt73
1. What happened to persistent changes? Do i need to install the driver every time i plug in the USB?
2. Why the data is 0 and i didnt get arp?