Ok firstly open up your task manager (ctrl-alt-del) and click on the process tab and look for the limewire exe and select the end now...You will probably see 2...
Then go to add/remove programs and uninstall Java, then download and re-install the JRE 5.11 using the offline installer (4th one down)....
Java SE Downloads - Previous Release - JDK 5
Once you have done that you will need to Port Forward as your modem/router has a Nat Firewall...
Here are your instructions...
Port Forwarding for the Siemens Speedstream-6520
Let me know how you get on...
