ESock_Client 14 : Descriptor parameter error

Hi,

In my app i've a socket server listening on some port.
Client sends an URL to my server. When socket server
receives data i pass incomming data to observer and keep
listening for more incomming data from connected client.

smth like this:

void CSocketEngine::RunL()
{

    if (iStatus == KErrNone)
    {
         iObserver.HandleUrl(iBuffer);
         IssueReceive(); // Issue socket.RecvOnceOrMore() again
    }
} 


In Observer's HandleUrl(......)    i'm starting a socket base http engine to download image from web server.

Both engines (Socket server, and socket based http client)
are AO.

upto here all goes fine.

I get : ESock_Client 14 : Descriptor parameter error
when socket client disconnects from server or sends
another url ( 

Could any1 explain me a bit whats wrong?

Thanks ahead!!