PDF to jpg CONVERT with ImageMagick-6.4.7-9-Q16-windows Problem

Hello,

I've just freshly downloaded and installed
ImageMagick-6.4.7-9-Q16-windows-dll.exe.  The logo test worked well. 

However, when trying to convert the following PDF to a gif or jpeg in
DOS cmd mode, I receive the the following error dialogue. Any
help/advice is greatly appreciated! 


xxx.pdf equals
http://www.csis.org/media/csis/pubs/081208_securingcyberspace_44.pdf

(Note: this PDF is somewhat odd; still shows up nicely in Acrobat, but
copy/paste just yields crab)

C:\TMP>convert xxx.pdf yyy.gif
convert: `%s': %s "gswin32c.exe" -q -dQUIET -dPARANOIDSAFER -dBATCH
-dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dEPSCrop -dAlignToPixels=0
-dGridFitTT=0 "-sDEVICE=pnmraw" -dTextAlphaBits=4 -dGraphicsAlphaBits=4
"-r72x72"
"-sOutputFile=C:/DOCUME~1/em055790/LOCALS~1/Temp/magick-riyBKduM"
"-fC:/DOCUME~1/em055790/LOCALS~1/Temp/magick-19DTYJ0A"
"-fC:/DOCUME~1/em055790/LOCALS~1/Temp/magick-t7xw7Sf1"
@utility.c/SystemCommand/1834.
convert: Postscript delegate failed `xxx.pdf': No such file or directory
@ pdf.c/ReadPDFImage/612.
convert: missing an image filename `yyy.gif' @
convert.c/ConvertImageCommand/2732.





With kind regards

Martin