Hardware Buttons Not Working not hardware issue

Can anyone familiar with building roms chime in please. I was modifying a rom I made trying to clean it up a bit and now the hardware buttons will not respond. I'm certain it's not a hardware issue but more than likely a file or dll that I deleted by mistake. Can anyone help me identify the problem. I don't want to scrap this rom because it's really fast and everything else is working fine except for this one issue. Thanks for the help.