Reaver software locks to zero in pin count

Hello guys!

I have a problem when using the reaver software.

I have no idea what is happening, it always for the moment begins to crack session.

Code:

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root@machine7:~# reaver -i wlan1mon -b 00:23:CD:F7:CA:F8 -A -vv

Reaver v1.5.2 WiFi Protected Setup Attack Tool
Copyright (c) 2011, Tactical Network Solutions, Craig Heffner <[email protected]>
mod by t6_x <[email protected]> & DataHead & Soxrok2212

[+] Waiting for beacon from 00:23:CD:F7:CA:F8
[+] Switching wlan1mon to channel 9
[+] Associated with 00:23:CD:F7:CC:B8 (ESSID: Roteador1)
[+] Starting Cracking Session. Pin count: 0, Max pin attempts: 11000

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What is wrong?

I tried to leave the computer for hours on and nothing, always lock here. This happens for every AP.

Thank you!