Haven't come across that error before, but we should rule out a possible problem with one of the songs.
Please let me know
1) What version of PowerWorship? Select Help > About , to find the version info. e.g. 3.0.0.x
2) What version of PowerPoint? 2007?
3) Does the problem happen if you only include one song in the presentation? Please try a few different songs, one at a time, and see if the same error occurs with each attempt.
4) Does PowerPoint launch successfully? e.g. do you see it in the Windows task bar and does it stay open after PowerWorship (I assume) shuts down?
Please see the following topic for instructions on downloading/installing the OpenOffice version of PowerWorship, for Windows.viewtopic.php?f=8&t=457
There isn't an install program for the OpenOffice version so the process is a bit more involved/manual, but it is fairly straight-forward.
Let me know if you have any questions or problems