Ahh, it makes sense now. Although I do have a file larger than 64kb that I'm trying to view, I have one that is 46.0kb that will not show either. The following is the list of the files before and after the mIRC cut, size and lines:

64kb file/1932 lines
  mIRC cuts to: 28.6kb file/658 lines

46.0kb file/995 lines
  mIRC cuts to: 29.2kb file/659 lines

Seems rather odd, to me, but I'm just not understanding it.