First, allways "use CGI;" to get values, it's simple, safe, and effective.

Second, you need to make sure you specify a value for the checkbox if you really want to be able to see if it is checked.

Eg: <INPUT TYPE=CHECKBOX NAME="MyBOX" VALUE="on">

Code:

if($cgi->param('MyBOX') eq 'on'){
   #Do whatever
}else{
   #...
}
[download]

This should also work:

if($cgi->param('MyBOX')){
   #Do whatever
}else{
   #...
}
[download]

But the first is a little more paranoid.

Hope this helps...