What I forgot to mention...
That file when open by simple double click,works perfectly,scheduled tasks for other applications works.
I'd run a recover on that file and any other files it is supposed to open with its opener script. A crash can damage a file and damage can crash a file so it's a good idea to make sure your files aren't damaged either as the cause or the effect of the crash.
I use Windows Task Scheduler on My XP system every night without any issue.