Arduino send MIDI to FL Studio over a MIDI to USB Converter Cable

I changed the velocity and what i should mention is that the LED for INPUT on the USB Cable wasnt right soldered so when i soldererd it good in, the LED started shining when i connected the MIDI IN to the Arduino. But it still doesnt play anything on the music program. I really dont know what to do at the moment anymore. Trying to get this to work almost for 2 weeks.

I will try it with your code.