Patrick, are you forgetting the \ at the end of c: ?
Your start directory is wrong, it needs to be the same directory line as your file above it, but with out the file name. ex: C:\ProgramFiles\WinMx\
And you may need to put double \'s in like: C:\\ProgramFiles\\WinMx\\
Sometimes strokeit (or windows I dont know which) is fussy about that, it thinks that just one \ is a separator for a command and not part of a path name (again, I think. I read something on this same issue waaayyyy back in the forum. Try doing a search for run command in this forum.)
You can also just leave the start directory blank and see if that works too, like before some progs are fussy that way and need to be hand-held to the file.