getting permission denied error on stopping a service

Hi,
On executing the command : service snippet stop i am getting the following error :
env: /etc/init.d/snippet: Permission Denied

what could be the reason ?

Here is my snippet file :

#!/bin/bash
# chkconfig: 3 99 99
# description: code snippet app
# processname: snippet

. /etc/rc.d/init.d/functions
prog="flocksnippet"
user="flocksnippet"

start()
{
PATH="$PATH:/bin"
PORT=$(awk -F= '/^PORT=/{print $2}' /root/flockApps.properties)
FLOCK_APPS_CONFIG=$(awk -F= '/^FLOCK_APPS_CONFIG=/{print $2}' /root/flockApps.properties)
cd /opt/flock-snippets/
exec="mvn jetty:run -DFLOCK_APPS_CONFIG=${FLOCK_APPS_CONFIG} -DPORT=${PORT}"
daemon --user=$user $exec &
}

stop()
{
PATH="$PATH:/bin"
echo -n $"Stopping $prog: "
killproc $prog

}

restart()
{
stop
start
}

case "$1" in
    start)
        $1
        ;;
    stop)
        $1
        ;;
    restart)
        $1
        ;;
    *)
       exit 2
esac
exit $?

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The user=flocksnippet is  a /sbin/nologin user and the filie snippet is owned by root.