Used "C:\Program Files\Defraggler\df64.exe" W: /ts /debug to create a log files

I use 2008 virtual servers. Lun volumes on each guest server. I will be running the

C:\Program Files\Defraggler\Defragmentation.bat"

This batch file is ran from scheduled tasks on the server and this actual line above is listed through the actions tab-------> Edit action------->Program/Script field.

Inside my batch file, I will be running "C:\Program Files\Defraggler\df64.exe" W: /ts /debug

The W: is the drive that will be degragging at that time. C: is where the defrag exe file is located. When in debug mode, the text log file is automatically sent to my C:.

How do i switch this from my C: drive to my W: drive.

Anyone know how this is done.