snoop an interface from within a script

I have a script that runs the snoop command on an interface and outputs to a log file. The script has been set with setuid to run as root. When I run the script not as root but another user I get the message "snoop: /dev/hme: Permission denied". It runs fine as root. Any ideas on why the setuid is not working?

[325 byte] By [hchsun1] at [2007-11-25 23:20:18]