ultraClean

hey guys, I picked up my midibox in progress for the first time in two years the other day and decided to hook it up and it's all running fine, receives programs and executes them just fine, but my issue is with connecting a DIN to my PIC core. I've tried using the midibox64 application on it as well as the midio128 project but just can't seem to get a response from the system when i connect one of the inputs on the DIN to the Vs of the said J header. I am getting good signal when i check it with my multimeter between the core and the DIN and I have tried multiple DINs but can't seem to get it to work still. I'm thinking that I am missing a crucial part possibly in my application that perhaps specifies what to listen for? i don't know, but any help is much appreciated it. -ajax