midi note input - ghost notes

HI
I am facing the following problem: I connected my old Roland 137R digital piano to my computer with a USB-

MIDI cable. When trying NOTE INPUT (step time or realtime) I am facing 2 problems:
(attached a sample file)

1. hitting a key on my Roland will add 3 notes each time (one of them very high, the other one very close to the note I hit)
2. each note that has been played will go on forever - I read in one of the topics that this can happen when the keyboard doesn't send a "note-off" signal. But on this old Roland there are no options for changing that.

Is this a lost case or am I doing something wrong?

Eric whatswrongmscz.mscz