Try setting your local ip and port in Tools > Preferences > network tab / advanced button of XoloX.

To see what your IP is ( you stated you are using a router) open a command/ms-dos prompt and type: ipconfig

Set the port to 6346. You may also want to forward port 6346 to your local IP in your router config. If you are using a hardware firewall i'd disable the POS wXP firewall which could be your problem.