I have been using PTViewer Scripter on an XP Pro machine for a while now. It is genuinely slow to open (and it is a fast machine), and almost always opens behind all of the other active windows, but it always opens. I can't imagine what would/could keep it from actually opening though. Wish I could help.
PTViewer Scripter can not run smoothly with JRE1.4.1 in Windows XP. If you want to use PTViewer Scripter in Winows, please use JRE1.3.1, which can be downloaded at http://java.sun.com/j2se/1.3/jre/download-windows.html .
To see is to believe