The Grinder - Client opened connection but sent no bytes

When attempting to use the TCPProxy tool included with The Grinder, I get the follow开发者_运维问答ing error. I have accepted

3/10/11 10:47:58 AM (tcpproxy): Failed to determine proxy destination.

Client opened connection but sent no bytes.

I have my browser proxy settings at localhost and the right port. I realise you need more details, so let me know which in particular.

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• Ensure you do not have a local antivirus which intercepts TCP connections
• Ensure your local firewall is not configured too strict
• Ensure you've set localhost:8001 as the http proxy in your browser, not socks
• Ensure your browser attempts to go to a real site, not the local proxy

Which browser on which OS? Any antivirus? Firewall? Are you connecting to a real non-SSL site? Do you normally use a proxy or directly connect?