You have created the object on Master page that causing the issue also missed the 'presence' after object name. I redesign the form but not on master Page and apply the below script and its working
Click event of 'Nee' radio button
if(this.rawValue == 1)
{
xfa.form.form1.subform1.sub1.presence="hidden";
}
Click event of 'Ja' radio button
if(this.rawValue == 1)
{
xfa.form.form1.subform1.sub1.presence="visible";
}
For more info refer the below screenshot.