Absolute Path for Images

Hey guys, I'm trying to run a Breve Program from the command line that will take a String (path to a file) as an argument and load the image there. My problem is that I can only seem to load images from the directory that I am in; if my working directory is c:\breve, the command "breve.exe -x test.tz test.jpg" works, but "breve.exe -x test.tz C:\breve\test.jpg" will throw me an error. Is there a way to fix this?

Thanks a lot.