Problem with tcp - client receive message

[gelman]

Hi, I'm making simple application in qt form my mobile phone (symbian), but I have problem with receiving message from server (computer) to client (mobile), which I want to set as text in label.
I dont know qt very well but I can make sending msg from client to server.

I did this (dont work):

QByteArray  buffer;
buffer.clear();
buffer = socket->readAll();
 
 if(buffer.size() == 0) //
{
     qDebug("Error: Empty buffer.");
}
 
 p1l->setText(buffer);

QByteArray  buffer;
buffer.clear();
buffer = socket->readAll();

 if(buffer.size() == 0) //
{
     qDebug("Error: Empty buffer.");
}

 p1l->setText(buffer);

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I'm getting error all the time and I dont know what to do. I tried do this in many ways and I googled a lot but with no result.
I would appreciate all your help.