When I include a.pps file either in a questionnaire or in a condition of an experiment (e.g. Condition 2 in sample 1), the MediaLab program hangs up and stops responding. I followed the instructions in the support web (i.e. close powerpoint before start using the MediaLab), but the problem was not fixed, so I don't know what is going wrong. Any ideas? I used Windows xp with MS office 2003.