Choose language in Microsoft Speech Engine

Question

Hello,

i use the microsoft speech engine (platform & sdk)

i downloaded: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=47ffd4e5-e682-4228-8058-dd895252a3c3&displaylang=en

the de-DE (German-Language) Version. But when i

SpeechSynthesizer foo = new SpeechSynthesizer();
            foo.Speak("kennzahlen vom jahr 2010");

it is english (pronounced). i think the default language is english - how can i choose the language? ( i already have the german language version)

thanks.