Hi-hat & Alesis Nitro Max

Hey guys. I have a problem that I am sure many of you are familiar with.

When using GarageBand/LogicPro, the half-open hi-hat has no sound. It must either open or closed. I managed to solve this issue by downloading MidiPipe and changing the note of the half-closed hi-hat to the note of open hi-hat. This way, the half-open made a sound.

However I haven't been playing for a while and now when I tried it again it is not working :(. I tried different computers (and even downloaded LogicPro because I thouhg it was a problem of GarageBand now) I was following the instructions int this video: https://www.youtube.com/watch?v=X6l2rXCXIpg (I did notice though that this guy has one less input than me when setting this. Could this be the issue?)

Are there any other solutions for this? It's driving me mad :( I would need it to be explain pretty easily, though. I am a newbie and all of these midi-related issues are so overwhelming... ANY help would be appreciated. Please!