network configuration with mappings

[Stephan Hermann]

Morning gentlemen,

I adjusted my network configuration this morning and finally it doesn't work 
anymore.

When I'm starting it manually, e.g. ifup home or ifup work it's working 
nicely.
I installed also the guessnet package (apt-get install guessnet)

What can it be, that the mapping eth0 is not working correctly.

thx for your help,

\sh

here's my actual interfaces file:

/etc/network/interfaces:

auto lo eth0
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
        script grep
        map eth0

mapping eth0
        script /usr/sbin/guessnet-ifupdown
        map home
        map work

iface home inet ppp
        provider dsl-provider

iface work inet dhcp