Hello, I don't know if this has anything to do with your trouble, but I was using DT interupts and changed the T1CON settings. The changes I made messed with the configureations Darrel made in the include file. My post was a few days ago "DT Interrupt and Elapsed Time Running Slow ". It might give you a clue. I'm new at this myself, but that's what my problem was.

Shane