You may in fact have more than one issue to deal with! You use a Linksys router which generally use NAT which is similar to a firewall. Your model must be a new model b/c I can't find exact instructions on forwarding a port on your model. But I suspect you wil need to forward a port to allow LW full access. Your router will limit incoming & perhaps this is related to your problem. I can provide you instructions for forwarding a port on a similar model (WRT54G, or WRT54G v1.1, v2 & CA) if it's necessary.

Please do the following test for me: Bug Report instructions & sample image (click on link) & report back to us whether your result for incoming is True/False?

Another suggestion, update your Java. LW is made thru Java & uses Java for its operation. The newest version was designed with Java 1.4.2 & 1.5 environments. Update your Java here: Java 1.4.x OR the latest Java 1.5 (take the JRE)