How did you edit crontab? (i.e. vi, emacs, gedit, crontab -e ... ?)
[snip]it was thinking that "root" was the command and was trying to run it.
Indeed. From the cron man page:
The sixth field of a line in a crontab file is a string that
is executed by the shell at the specified times.
... if you want it executed with root privaledges, then it should be in the root user's crontab.
So the next question is: are you sure you edited the right one?