unable to index pdf files

I am unable to index pdf files.  The following may be of some help

1. All pdf files have lower case extensions
2. xpdf is located in c:/xpdf
3. Some of the code in the conf.pl file include
	
	%EXT_FILTER = (
	   "pdf" => "c:\xpdf\pdftotext FILENAME ",
	   "doc" => "/usr/bin/antiword FILENAME"
);

	


  
	@EXT = ("htm","html","shtml","asp","pdf","doc","xls");




	
	@HTTP_CONTENT_TYPES = ('text/html', 'text/plain',
'application/msword', 'application/pdf');


4.  I can change pdf to text at command prompt.

5.  The error I receive is 
'-' is not recognized as an internal or external command,
operable program or batch file.

6.  html files are indexed


RICK 

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