Roadrunner might be limiting your uploads. The link below suggests that roadrunner are packet shaping for high bandwidth users (eg p2p).
[TWC] TW Officially Announces Packet Shaping for All RR Users - dslreports.com
Wiki: Road Runner (ISP)

The same kind of thing has happened to other users (of other ISPs) in the past eg:
http://www.gnutellaforums.com/downlo...o-uploads.html

You could try changing ports. In LW tools > options > advanced > firewall config > change LW's listening port to 65000 (or something in the range of 49152 - 65535) > apply > ok.

Otherwise, give us your system details.
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