Since I am brand new to the program, I realize the problem I'm having may be of my own making. I have a Treo 600 and installed the trial version. At first it appeared to be fine, but then it froze up and I couldn't exit the program or get anything to work. Finally I manually hit reset and everything else on the PDA seemed to work OK. However, when i went to ISilo it showed a blank where data had been. The icons were at the bottom of the screen but again the PDA froze until I manually reset it. I don't know if perhaps there is something with the Treo OS that doesn't agree with it, or perhaps the data. I can run the same data 50,000 lines in C-Spot and it runs OK. Any help would be appreciated. The program appears to be exactly what I need if I can get it to work.