MIDI import - just piano sound

[Glampfenpit]

Hi, Newbi here,

may be I'm just missing a tiny thing...
FL Studio 20.8.1. WIN10

Each time I import a MIDI file containing drums, bass, pads und so on I get a chunk of events only playing piano sound.
Importing to a new empty project.

Playing the same MIDI file with e.g. WinAmp sounds perfect, which means to me, that instrument info is contained.

Any help? Thanks.

Regards Peter