Resol Vbus Cosmo Multi flow set heating temp

I recently updated my well working openhab 2.5 to the version 3.4.5
and adjusted Things and Items according to the documentation here:

Now i have an issue with the the flow set heating item

In old version 2.5

Number Resol_Vorlauf_Temp_Soll "Soll [%.1f °C]" (Resol_Temp) { channel="resol:device:xxxxxx:COSMO_Multi-Controller:Flow_set_heating_circuit_Sensor_11" }

In new version 3.4.5 it will not show flow set temperature :man_shrugging:

Number Resol_Vorlauf_Temp_Soll "Soll [%.1f °C]" (Resol_Temp) { channel="resol:device:VBUS:COSMO_Multi-Controller:flow_set_temperature" }

But it works for the item

Number Resol_Vorlauf_Temp "Aktuell [%.1f °C]" (Resol_Temp) { channel="resol:device:VBUS:COSMO_Multi-Controller:temperature_sensor_6" }

Does somebody have an idea what is wrong here?
It’s a Cosmo Multi 2 Controller connected to the Resol Vbus LAN Device.

Ok, found the solution, just use small letters: