The param method doesn't seem to work for checkboxes.

Oh, yes it does :-)

Here's a cut-down version of what (I think) you're doing:

    param('checkbox', 1);

    print checkbox(-name=>'checkbox',
                   -value=>'checkbox',
                   -label=>'My Checkbox');
[download]

    <INPUT TYPE="checkbox" NAME="checkbox" VALUE="checkbox">My Checkbo
+x
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And it is supposed to print it -- after all, you gave it the value "1", not "checkbox"!

Try instead:

param('checkbox', 1);

print checkbox(-name=>'checkbox',
               -value=>'checkbox',
               -label=>"My Checkbox\n");

print checkbox(-name=>'checkbox',
               -value=>'1',
               -label=>'My Checkbox, value 1');
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This should print so:

<INPUT TYPE="checkbox" NAME="checkbox" VALUE="checkbox">My Checkbox
<INPUT TYPE="checkbox" NAME="checkbox" VALUE="1" CHECKED>My Checkbox, 
+value 1
[download]

The Sidhekin