NSW 12 Disk DR not working

When I go to run Disk Docter and tell it to run on reboot it does not run.

All I see is a booting to the Desktop.

 

There is no dialog on the screen like you would see if you ran the Windows version Error-Checling (Scandisk) program.

 

If there any way to see if it ran (log) or is there a problem.

 

If it is a problem, how do I fix it?

 

Windows XP Pro SP3