Your problem appears to be your ISP -> CARPHONE WAREHOUSE BROADBAND SERVICES which shapes p2p file sharing. That's of course if you are using same ISP for LW as you posted here. You will find them listed here ISP's known to BLOCK or Filter p2p or specifically Limewire (Click on blue link) #18.

It's my guess you are using AOL right? In the UK, AOL uses a few ISP's but Carphone Warehouse is one of the main ones AOL uses depending on your exact location.