Slow dial-up

I am using a U.S. Robotics 56K Performance Pro V.92 PCI modem which is fully supported. My ISP supports V.92. I am using Kinternet to connect. Yet, when downloading files from http or ftp, my datarate is averaging 3Kb/s( yes it spikes to 10Kb/s and drops to 0Kb/s, but still averages 3Kb/s). I am locked on that one file that is downloading, and until it is fully downloaded I can't use my connection for anything else (even trading a slower datarate for further access or multiple downloads). Bernd