Too Many Connections From this IP

When I open my ftp Client to upload filed on a specific server I often get the message:

too many connections from this IP
server closed connection

I've tried to go in to the settings area to set it up so that it does not allow more than 8 connections to any specific server but I can't find such a setting. To my frustration I sometimes have to wait more than 24 hours before my ftp client can connect to that specific server.

Can anybody help me.