I’m sorry, but this is English forum only. Anyway, seems like you have IP address conflict or something like that. It’s required to set the IP address of the computer to 192.168.1.X, where X is arbitrary.
BUT!
The IP address set by DIP switch must be different from the one set in computer!
When everything is set, you can use Fiesta.NET Searcher to locate the devices.
Michal