reaver-wps cant switch channel nor associate before I try to connect the wifi with UI wifi manager

Answer the following questions for every issue submitted:

0. What version of Reaver are you using?  (Only defects against the latest
version will be considered.)
Reaver 1.4

1. What operating system are you using (Linux is the only supported OS)?
Kali Linux, Debian, on raspberry pi

2. Is your wireless card in monitor mode (yes/no)?3
yes,mon0

3. What is the signal strength of the Access Point you are trying to crack?
-40dB or so,it is enough to crack

4. What is the manufacturer and model # of the device you are trying to
crack?
any router supports WPS, and unlocked

5. What is the entire command line string you are supplying to reaver?
reaver -i mon0 -b 14:75:90:XX:XX:XX -vv -a -n --channel 11

6. Please describe what you think the issue is.
   On raspberry pi kali Linux,i use wash to scan available ssids,it shows no ap available in the list.there are some wps available ssids surrounded(confirmed by another computer).
   Then i try to reaver an AP called AAA which mac is 14:75:90:XX:XX:XX 
   I use the command 
           reaver -i mon0 -b 14:75:90:XX:XX:XX -vv -a -n
   it keeps switching channels.then i added "--channel 11" to fix channel,it stays associating for a long time.
   However,when i try to connect AAA via a wrong password with UI wifi manager on the desktop.
   the reaver then associated with the ap starting cracking normally.weired,isnt it?

   On BT5, using the same USB wireless card,the same version of reaver,it works perfectly.

PS,i used a usb hub to make sure the card gets enough power supply.

7. Paste the output from Reaver below.

Reaver v1.4 WiFi Protected Setup Attack Tool
Copyright (c) 2011, Tactical Network Solutions, Craig Heffner 
<cheffner@tacnetsol.com>

[+] Switching mon0 to channel 11
[+] Waiting for beacon from 14:75:90:XX:XX:XX 

after i tried to connect AAA with password(no matter right or wrong) on 
desktop, it goes well.

Original issue reported on code.google.com by duchenpaul@gmail.com on 20 Sep 2014 at 4:46

adithlm10 / reaver-wps

reaver-wps cant switch channel nor associate before I try to connect the wifi with UI wifi manager #661