Several people have had trouble with this. I made a mistake when uploading the file which may have created the problem. I've completely uploaded the files again to make sure they are in the right place. The program is now v1.01 which adds a couple of small new commands and fixes a couple of minor bugs.
http://homepages.tesco.net/dilwyn.jones/software/freeware/freeware.htm l -- Dilwyn Jones