Show Cue System

I have the same show, same cue, same file running on a theatre laptop and a home PC. On the home PC, all is well - a 0.69 sec wav plays and stops (attachment 2).
On the theatre laptop, the file reports being 4:15.31 long. It plays for 0.69 seconds, then freezes. (attachment 1). Last night, SCS froze later in the show and had to be re-launched.
Any thoughts?

Please email me diagnostic files from both machines (and tell me which one's which!). You can create this file by starting SCS and selecting 'Create Diagnostic File' from the drop-down menu displayed when you click the Help button in the main window. The file will be saved in a folder named "SCS Diagnostics" under "Documents" or "My Documents".