I don't know if this will help you, but it is worth a try. Try to use the "-w secs" option on netcat. The following link is a tutorial about someone transmitting files through netcat while using the...

What's the error you getting when booting backtrack from usb? and also did you try to boot from your usb on another computer?

in case the above commands wont work, then try:
/etc/init.d/wicd start
/usr/bin/wicd-client &

A quick google search, showed the following people that have the same problem as you:
BackTrack 4...

Hi, I really enjoy being part of this forum

You could also use proxies when visiting a suspected site to hide your real IP-address, so the attacker wont get your real IP...