You have the right format although you should drop the pipe keystroke on the end the |
Access-ID|Secretkey|ip:port
But in your screenshot it seems the error is coming from the proxy. Try removing the proxy and then try it, does it work? If so just use it without a proxy or get a new proxy. You can use 1 moz key without a proxy, but if you use more then 1 you need proxies for the rest.