Your Netcomm has an internal firewall, that could be what's stopping your connection. I had an NB 1300 & had to port forward. Try that. Here are the instructions.
Port Forwarding for the Netcomm NB1300-ADSL

Don't forget the step of setting up a static IP (it's in the instructions), otherwise port forwarding won't work. LW's listening port, port in the 'manual port forward' box & port forwarded within a router must all be the same number.

ah screw i'd probly miss a step and mess up the whole computer

thanks 4 ur help birdy

Ok, try deleting LW's preferences folder when LW's properly closed (check in task manager to make sure). Check out point 3 below for the location of that folder. Also look at point 2's location if you've used way older versions (4.9.33 or earlier) in the past.
Fixes for LimeWire

That folder within Application Data's hidden by default, so you'll have to show hidden files & folders to be able to see it.
Sticky: LimeWire Pref Folder in Vista

If that doesn't help, uninstall your version of Java & then reinstall. Make sure to use the JRE offline installer.
Java SE Downloads

woo birdy LW started working - it'll probly be stopped by 2morrow but oh well

is there like a rep system on this forum?