xml-filter, export replaces " with "

Hi,

I use an xml filter (XML v 2.0.0.0) for my translation documents (wordpress wpml files ...), it works so far, but within the export file every " is replaced by "  - the ampersand version for double quotes.

I checked, the source document has " and is utf-8 encoded, within Trados there are also only simple ".

How can I keep the " within the exported files?

Many thanks

Ralf