I'm evaluating RPT. I've got it installed and set up and I've tried to run a few tests of a simple intranet page (open page, do a search). The script is created fine and I can create a schedule (1 user). When I run the schedule, I get the following error message:

Test Run aborted due to error
A Test could not be launched on Driver: localhost due to an internal error.
Please see Problem Determination Log.

Anyone seen this error before and know what it means and how to correct it?
Where is the 'Problem Determination Log'.

Like I said, I'm evaluating it and so far it's been a pain in the neck to get this far so any help would be appreciated.