medialab problems when office 2007 and 2003 installed

Hi,

medialab has a problem to run a questionaire in which a directRT-file is implemented. Could this be due to a parallel installation of office 2003 and 2007? There is one additional thing: when I open the experiment editor I got the error message "Conversion from string "Wahr" to Boolean is not valid" (attached a picture of the error message, unfortunately partly in German, but perhaps someone can nevertheless help?)
thank you in advance!