Logic Pro X not working with certain midi keys.

Hello all,

My midi keyboard encounters some problems with logic. I must have haplessly changed the settings a while ago and don't know what I did, because my keyboard still works perfectly with other applications. What happens is when I press certain keys such as B2 or A3 it makes no sound. The keystrokes still register in logic, its just the velocity defaults to 0 for some reason. Also, one of the notes, E3 has infinite sustain and rings out forever whenever I press it (also only in Logic). I must have changed these settings, but I can't find any info online on how to fix this.

Thank you for your help