Halion6 map to key in sample name does not work


I just found this video and try to replicate the feature to map samples according to key names in text.


I have samples named sample-C2.wav sample-G2.wav sample-B2.wav and so on. If I do as in this video all my samples get put on C2 and Nothing else. What have I done strange? Is there a setting to override the mapping?