SV_AuthorizeIpPacket: challenge not found

[feanor]

how can i fix that ??
SV_AuthorizeIpPacket: challenge not found

[Paho]

Maybe these problems:

• invalid IPs from connecting
• invalid cdkey
• you have too many files in the main folder iwd!
• poor connection less 1mb/sec need ~ 100

Methods:

• open ports
• Lock address in htaccess:
  cod2master.activision.com
  cod2authorize.activision.com
• use crack binaries server
• use reliable hosting(VDS)

https://znation.nl/libcod/

Activision's answer(http://www.fpsadmin.com/):
SV_AuthorizeIpPacket: challenge not found
Question
I am running a server and I am getting ther error "SV_AuthorizeIpPacket: challenge not found".
Answer
This can happen as a result of running mods. Uninstall the game, delete the game folder, and then reinstall the game and the patch. Make sure that you do not install any third party maps/mods/skins of any type.

P.S. I got this error when playing through hamachi