Nextgen gallery slideshow widget issue

Just installed… don’t more show nextgen widget slidesow if url is changed from default language (see in sidebar).
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Link OK: http://vegamami.altervista.org/dalla-loro-parte/veg/fuori-dal-gregge-psicologia-e-sociologia-del-gruppo/

Link BAD (it show: Get the Flash Player to see the slideshow): http://vegamami.altervista.org/en/dalla-loro-parte/veg/fuori-dal-gregge-psicologia-e-sociologia-del-gruppo/

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http://wordpress.org/extend/plugins/transposh-translation-filter-for-wordpress/