Most minicom problems occur because the settings don't match. Make sure thet the baud, parity and everything else, that they all match exactly. Also, after connecting with minicom press Enter a few times. Get yourself familiar with minicom. It's very easy once you try it.
As an alternative you may want to try connecting with a Windows Hyperterminal to narrow down where the problem is coming from; wether it's your terminal client or your server.
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