Import missing preference

Hi All,

I'm trying to import a missing preference at Site level.

followed article CS152142 it throws an below error:

org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 23; Document root element "csvPreferenceInstance", must match DOCTYPE root "null"

==

Referred to one of the article on community and used the below xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE PreferenceImpExp SYSTEM "standardX20.dtd">
<PreferenceImpExp>
<PreferenceInstance>
<name>Part to Document Association Logic</name>
<clientName>WINDCHILL</clientName>
<value>Yes</value>
<locked>false</locked>
</PreferenceInstance>
</PreferenceImpExp>

=

this also throws below error

Cannot import "Preference Instance" "Part to Document Association Logic" as there in no matching preference definition with name "Part to Document Association Logic".

any help would be appriciated.