prefilled forms values not carried to the over

Hi there,

I am trying to use the %get[key] feature to prefill the form fields from the URL.

The fields in the form are being filled without any problem but I noticed a weird problem.

when I place a restriction on the text field and change it to "Disabled"(Make this field non-editable. Useful for setting an unchangeable default value) then the values are not carried over in the form.

now once this restriction is removed and the field is not disabled then the fields values will show up in the submitted form..! why is that?