It is just my case and the reason my 6100 WeatherLink doesn't connect and work:
My Davis station is US model and I live in Poland. So that, what should I do and what to delete and from where?
No way a US station can communicate at a "European or Asian" location with any WLL.
The WLL will use the frequency for the location it is set to be. If you set it "somewhere in Europe" it will listen at the official European frequency.
If you want to use your station + your WLL:
You have to setup the WLL to be in the US, you can set your WLL account to a US latitude/longitude
Better change your topic header, it is not a "Faulty" WLL.
Change it to "How to use a USA-frequency Davis station with a WLL in Europe"
Wim