Shell Script Error

[sagarbsa]

Hii, I have a shell script to create a small dialog box to select options and give the output. But it is exiting the script without displaying anything. Can anyone help me with this

cat > smenu
#
#How to create small menu using dialog
#
dialog --backtitle "Linux Shell Script Tutorial " --title "Main\
Menu" --menu "Move using [UP] [DOWN],[Enter] to\
Select" 15 50 3\
Date/time "Shows Date and Time"\
Calendar "To see calendar "\
Editor "To start vi editor " 2>/tmp/menuitem.$$
menuitem=`cat /tmp/menuitem.$$`
opt=$?
case $menuitem in
Date/time) date;;
Calendar) cal;;
Editor) vi;;
esac