WinMX Uploads

For some reason, when I turned on my computer, today, I had to reinstall WinMX. Now, when someone tries to upload a song from me, it disconnects them. I don’t have my firewall on. Does anyone know what could be wrong. Thanks!

if your behind a proxy that might be the reason try to reconfigure your ports to see if thats helps. also your ISP may block connections based on certain ports