We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
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It may be that the responses to requests you are making of the host aren't making it back to you. This may be for a variety of reasons.
It could be the way you server is configured.
One thing to try is to forward requests that come in on the ports that EU uses directly to your computer. EU uses DirectPlay so the ports it uses are 2300-2400 and 47624. So you may need to open or forward these ports.