[Inkscape-user] interpolate texte in .47 version

Hello, I can't interpolate texte as in the version .45 here the tutorial i followed. http://translate.google.fr/translate?hl=fr&langpair=en|fr&u=http:... That's the way i do it, what's wrong please ? - type texte - selecte and choose path - duplicate and seperate -selecte both and choose interpolate ... Nothing happens Instead it work welle with any objet but not next. I'm on ubuntu studio 9.10 french version. Thank you for your answers Haldun