OBERHEIM SYNTH

I have a .wav file of the factory presets on my iPhone, and am trying to load it into my OB-Xa but am having trouble.

I have a cable from the headphone out to the TO OUTPUT jack on the OB-Xa.

When I turn switch the CASSETTE ENABLE switch, the front panel CASSETTE LIGHT lights up.

I can hear the .wav file in the OB-Xa's output, but nothing happens. When I press PLAY on the OB-Xa front panel, the PLAY switch does not light.

I am able to write patches to all of the memory locations, but cannot load anything via the cassette interface.

Any ideas?