Dwight, thanks for your help. The only thing is  we are using Shared Memory
protocol, not TCP/IP. There was a moment we tested with TCP/IP and its values,
but it was even worse. That's why we have continued using Shared Memory
protocol.

  Thanks again,
                                             Mariajo.

María José Rodríguez Canales
Dpto. Gestión de Sistemas y Redes - IBM
e-mail: mar_jose AT es.ibm DOT com
Tf:  91 - 397 70 19