Install two network interfaces

[Lirex]

On my desktop having a NIC 3Com, connected to the company intranet and correctly working, I have added a second NIC ( Realtek RTL-8139) to connect a second small network ( three devices, instrumentation) using static addressing.
The new board seems to be rekognized by Ubuntu, indicating "auto eth1" in the Network connections dialog. When I try to configure the connection, the "Apply" button is always disabled, therefore I cannot activate it.

The command lspci shows that the board has been recognized but when i sent the

lshw -c network

the response is:
*-network:0 DISABLED
description: Ethernet interface
product: RTL-8139/8139C/8139C+
vendor: Realtek Semiconductor Co., Ltd.
physical id: 9
logical name: eth1
... other...
*-network:1
description: Ethernet interface
product: 3c905C-TX/TX-M [Tornado]
vendor: 3Com Corporation
physical id: c
logical name: eth0
version: 78
serial: 00:06:5b:13:7e:8b
.... other....

*-network DISABLED
description: Ethernet interface
physical id: 1
logical name: pan0
serial: 32:07:ea:24:67:f9
... other ...

The network 0 ( eth1) is indicated as disabled and the Serial MAC is not shown ,
the network 1 ( eth0) is correctly working
another logical name (pan0) with the serial MAC of the new board appears

Any idea ?

Tanks
Luciano

[mzv]

hi!
try ifconfig eth1 up