At first glance, it looks like a problem with the blank field in the path name. It may be, that in this case the method just checks for existance of a file "Program" in folder "C:\".
Maybe you can try to select the file via F4 help and check the path given here. Just to check.
For deeper analysis, it may be helpful if you could provide us the content of the call itself.
Regards,
Kai