So I hooked up Midi Monitor, and this is what it gets when I press C3 on my Midi keyboard:

Since I got this on two (Win7) partitions, it seems to be a hardware defect.
I'm using the MIDI out of my other card, and Usb, so this no big harm for me.
But maybe a sign of my Scope card getting antique?
(Disconnecting Usb makes no difference; Midi cable is ok, because MidiOut of my other card works)
Has anybody got problems like this?