Need help with X11EmbedContainer

Hello everyone!

I'm developing a program using qt4 and I have a little problem now.
I'm trying to include gedit into a QWorkspace and this is my code:

QX11EmbedContainer* container = new QX11EmbedContainer(this);
QProcess *proc = new QProcess(container);
ws->addWindow(container);
container->show();
proc->start("gedit");
The execution of this code, opens gedit, but it isn't embeded into the QWorkspace.

Does anybody know how to make it appear inside the workspace?

Thank you in advance.

Alberto