Your Modem/Router has a Nat Firewall within, so by port forwarding it, it should then allow limewire through...
These are your instructions...
This one is for Westell Versalink 327W
Port Forwarding for the Westell Versalink 327W
This one is for Westell Versalink-327W
Port Forwarding for the Westell Versalink 327W
Just check the instructions to see which one is yours...The difference being the -