Thanks Jesse,
The problem was that the KB article has the 'bin/kill' on its own line rather than following on as a single line as in your post above. I added the following to my sudoers file and it caused syntax errors:
Host_Alias FMSHOST = Hostname
Defaults:fmserver targetpw, timestamp_timeout=0, passwd_tries=1
fmserver FMSHOST = (ALL) /Library/FileMaker Server/Data/Scripts/*, /
bin/kill
Once I moved 'bin/kill' up onto the previous line, the sudoers file saved with no syntax errors. I've set the schedule to run with the root user account.
Thanks for your help.