Send sysex files to my DX-7

i want to send sysex-files (soundbanks) to my dx-7. i am using sysex librarian with my macbook pro. i select pyramid usb in the the pyramid settings -> transmit sysex -> Midi A. But the pyramid doesnt receive any data from the app. isnt it possible? or what did i wrong?

Pyramid only "thru"s Sysex from DIN input to DIN output. Pyramid totally ignores MIDI Sysex.

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