We seem to be on the same wavelength here Chief.
Lyllo, tell us exactly whats plugged into each network card and the name of your dsl provider as well please.

[matteo@localhost matteo]$ su -
[root@localhost root]# ifconfig eth0 down
[root@localhost root]# ifconfig eth1 down
eth1: unknown interface: No such device
[root@localhost root]# dhcpcd eth1
[root@localhost root]# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:258 errors:0 dropped:0 overruns:0 frame:0
TX packets:258 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:21161 (20.6 Kb) TX bytes:21161 (20.6 Kb)

sl0 Link encap:Serial Line IP
inet addr:10.0.0.2 P-t-P:10.0.0.3 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:0 (0.0 b) TX bytes:132 (132.0 b)


then modules.conf

probeall scsi_hostadapter ide-scsi
alias eth0 8139too
above snd-intel8x0 snd-pcm-oss
alias sound-slot-0 snd-intel8x0
probeall usb-interface usb-ohci
options 8139too
options tap0 -o tap0 unit=0

then, jsut as info: booting modules

# /etc/modules: kernel modules to load at boot time.
#
# This file should contain the names of kernel modules that are
# to be loaded at boot time, one per line. Comments begin with
# a `#', and everything on the line after them are ignored.

scsi_hostadapter

Ok, we have two network interfaces, one is a Realtek-8139 (probably a pci card) and one is a SiS-900 (probably an onboard controller) that is not detected, which one is your modem plugged into?

the realtek one is the one recognized as the one to be used for the lan
the other i cant understand if is the onboard audio controller or the external ethernet card that i have...

would you like to know from wich OS i'm writing this message right now?

a strange OS called MANDRAKE 9.0!!!!!!!!!!!!!!!!!!!!!!!!

wandedring what was the problem?

i've not settend in bios BOOT MANAGER OS Plug&Play [NO]

it was not possible i became stupid!

now thank you very much for the help you gave me!

don't worry i'll be back in a new topic with three or four questions!

c ya on the other side. (dark one)

Glad it got worked out