}
private void doLaunch(UserRequest ureq) {
boolean iniframe = config.getBooleanSafe(TUConfigForm.CONFIG_IFRAME);
// create the possibility to float
CloneableController controller;
if (iniframe) {
// Do not dispose this controller if the course is closed...
IframeTunnelController ifC = new IframeTunnelController(ureq, getWindowControl(), config);
controller = ifC;
} else {