It's great that you provided pictures of your setup because the reason is now clearly visible.
To operate a hybrid radio, which includes RadioDNS, it is necessary to clearly tell the receiver which station it is currently tuned to. Since RadioDNS operates in many countries and on several continents, the PI alone (which works more or less only at the national level) is not enough for that identification, so the ECC byte must also be added. These two pieces of information (PI and ECC) must exactly match your settings on the hybrid radio server. RDS encoders that do not support ECC service can no longer be used and must be replaced.
PI and ECC codes are usually assigned by the national authority. Otherwise, you can use the built-in calculator (select Help and PI Calculator from the menu).
So now to your case. You have set ECC to A0, but you are using the UECP model. It is specific for it that individual RDS services are turned on by inserting the appropriate group type designation into the Group Sequence. In your case, for ECC to actually be transmitted, you have to insert 1A into the Group Sequence. It is there by default, but you probably deleted it thinking that it was not needed.
For the BW V3 the 'READBEST' model may be a better choice, however, this has no effect on the case described above.
