Use your computer's search to look for a folder called LimeWire (exactly as it looks here, with capital L & W)...what shows up?
For anyone else reading: DJ C Blizzard can't find a LimeWire folder within Application Data (App Data not hidden).

Roadrunner are known to shape bandwidth...
[TWC] TW Officially Announces Packet Shaping for All RR Users - dslreports.com
...since your port test fails maybe they're blocking you. Did you try changing ports? Have you tried any other p2p apps?