sudden connection loss

Hey! I've been using Limewire with no problems for 18mths-2yrs, but suddenly I'm getting basically no connection to the network - searches etc aren't working, and only the itty bitty green bar showing on connection status. I always get good speeds and haven't recently changed anything in my setup. Please help if you can.

1. XP
2. Just windows - zonealarm was sh**ting me so I dumped it 2 months ago
3. 2gb RAM
4. 106gb
5. broadband
6. Dynalink RTA1320
7. home connection (an apartment)
8. 14.6.6 and 1.6.0_05
9. Spin
10. It appears. Black text on white background.
11. nope
12. new problem with an experienced user.
13. Yeah, always have, never had any issues
15. AVG (free), adaware (free) and ccleaner
16. Australia

Thanks!