using windows 10

on compilation following error appears:

ERROR: LoadError: can't find gramfile file: sample.grammar

 in main() at C:\voxforge\bin\mkdfa.jl:127

 in include_from_node1 at .\loading.jl:488

 in process_options at .\client.jl:265

 in _start at .\client.jl:321

while loading C:\voxforge\bin\mkdfa.jl, in expression starting on line 164

All other path variables and apps works fine...just this error troubling me...

my directory: 

C:\voxforge\bin

C:\voxforge\tutorial