When trading with one person, we have no problem connecting to each others system. I can download files from him with no problem. However, when he downloads from me, his files become disconnected in <5 s and he gets a "file mismatch error". This happens all of the time on every file, even when at the beginning. When he downloads the same file from others, he has no problem even at the same time he is trying to download from me.
He is running Winmx 3.53 and I'm running winmx3.54 beta. I have windows XP he has windows vista 64.
Neither of us seem have a problem with other traders.
What can be causing this?