Forums mIRC Help alternate server method error with DCCs

Whenever I try to access *SOME* (not all) DCC servers, I get this error.
"Server Notice: This server is using an alternate server method, please make sure your DCC Server is active and set to port 6668. /dccserver +sc on 6668. This is a mIRC command."

I've tried setting mIRC to listen to the port that the error tells me, under Options/DCC/Server. But I still continue to get this error, on the server that gave it too me. Also note, it seems most servers say to "/dccserver +sc on 59" but, others say differently. I've used search, and found nothing on this topic.