Dont know what to do!!! no network SOLVED

Question

Hi all.i'm a ...absolutly beginer in arch so I can't setup my network and so...
I am using mandriva write now but woud like to switch to arch cause mandy isn't preforming so well lately
So-here is my rc.conf
# NETWORKING
HOSTNAME="myhost"
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
# - prefix an entry in INTERFACES with a ! to disable it
# - no hyphens in your interface names - Bash doesn't like it
# Note: to use DHCP, set your interface to be "dhcp" (eth0="dhcp")
lo="lo 127.0.0.1"
eth0="eth0 10.0.0.100 netmask 255.255.255.0 broadcast 10.0.0.255"
INTERFACES=(lo eth0)
# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
# - prefix an entry in ROUTES with a ! to disable it
gateway="default gw 10.0.0.1"
ROUTES=(!gateway)
# Enable these network profiles at boot-up. These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
# Network profiles are found in /etc/network-profiles
#NET_PROFILES=(main)
I was told to do :
pacman -Sy
and so on,but I got something like this :community  is not in the list (not exactly the same but you got the idea I guess)
when I tried to ping the gateway i got : network is unreachable -or something similar.
At the end-could somebody tell me whats wrong whit my configuration.
I suppose that the IP-s are the responsable

Answer 1

here is the next one:
I install- gnome ;xorg ;xorg-clients ;xorg-apps ;xf86-video-vga (this was not a "clean install"-some errors appears here,don't remember them exactly) , and then a try to make my xorgconfig , but I had no luck!
I have ATI radeon 9550 128 MB -so i try the ATI  (generic) and ATI radeon
but the firstone tells that ATI module isn't there.The second tells that radeon module isn't either when I run startx!
modprobe radeon didn't help me!modeprobe ati-no such module!
any help?
PS: shoud I paste the xorg.conf from mandriva to arch?
this is it:
# File generated by XFdrake.
# Refer to the XF86Config man page for details about the format of
# this file.
Section "ServerLayout"
Identifier "layout1"
Screen "screen1" 0 0
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
EndSection
Section "Files"
# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Mandrake 6.0 and later now use a font server independent of
# the X server to render fonts.
FontPath "unix/:-1"
EndSection
Section "Module"
Load "dbe" # Double-Buffering Extension
Load "v4l" # Video for Linux
Load "extmod"
Load "type1"
Load "freetype"
Load "glx" # 3D layer
Load "dri" # direct rendering
EndSection
Section "ServerFlags"
#DontZap # disable <Crtl><Alt><BS> (server abort)
# allows the server to start up even if the mouse does not work
#DontZoom # disable <Crtl><Alt><KP_>/<KP_> (resolution switching)
Option "allowmouseopenfail"
EndSection
Section "InputDevice"
Identifier "Keyboard1"
Driver "keyboard"
Option "XkbModel" "compaqik7"
Option "XkbLayout" "us,bg(phonetic)"
Option "XkbOptions" "grp:lwin_toggle,grp_led:scroll,compose:rwin"
EndSection
Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/mouse"
Option "ZAxisMapping" "4 5"
EndSection
Section "Monitor"
# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
Identifier "monitor1"
VendorName "Plug'n Play"
ModelName "COMPAQ V75"
### Comment all HorizSync and VertSync values to use DDC:
HorizSync 30.0 - 69.0
VertRefresh 50.0 - 120.0
ModeLine "768x576" 50.0 768 832 846 1000 576 590 595 630
ModeLine "768x576" 63.1 768 800 960 1024 576 578 590 616
EndSection
Section "Device"
# === Screen Management ===
# Note: When OpenGL Overlay is enabled, Video Overlay
# will be disabled automatically
Identifier "device1"
Driver "ati"
VendorName "ATI"
BoardName "ATI Radeon (fglrx)"
Option "DPMS"
# === disable PnP Monitor ===
#Option "NoDDC"
# === disable/enable XAA/DRI ===
Option "no_accel" "no"
Option "no_dri" "no"
# === FireGL DDX driver module specific settings ===
Option "DesktopSetup" "0x00000000"
Option "MonitorLayout" "AUTO, AUTO"
Option "IgnoreEDID" "off"
Option "HSync2" "unspecified"
Option "VRefresh2" "unspecified"
Option "ScreenOverlap" "0"
# === TV-out Management ===
Option "NoTV" "yes"
Option "TVStandard" "NTSC-M"
Option "TVHSizeAdj" "0"
Option "TVVSizeAdj" "0"
Option "TVHPosAdj" "0"
Option "TVVPosAdj" "0"
Option "TVHStartAdj" "0"
Option "TVColorAdj" "0"
Option "GammaCorrectionI" "0x00000000"
Option "GammaCorrectionII" "0x00000000"
# === OpenGL specific profiles/settings ===
Option "Capabilities" "0x00000000"
# === Video Overlay for the Xv extension ===
Option "VideoOverlay" "on"
# === OpenGL Overlay ===
Option "OpenGLOverlay" "off"
Option "CenterMode" "off"
# === QBS Support ===
Option "Stereo" "off"
Option "StereoSyncEnable" "1"
# === Misc Options ===
Option "UseFastTLS" "0"
Option "BlockSignalsOnLock" "on"
Option "UseInternalAGPGART" "no"
Option "ForceGenericCPU" "no"
# === FSAA ===
Option "FSAAScale" "1"
Option "FSAADisableGamma" "no"
Option "FSAACustomizeMSPos" "no"
Option "FSAAMSPosX0" "0.000000"
Option "FSAAMSPosY0" "0.000000"
Option "FSAAMSPosX1" "0.000000"
Option "FSAAMSPosY1" "0.000000"
Option "FSAAMSPosX2" "0.000000"
Option "FSAAMSPosY2" "0.000000"
Option "FSAAMSPosX3" "0.000000"
Option "FSAAMSPosY3" "0.000000"
Option "FSAAMSPosX4" "0.000000"
Option "FSAAMSPosY4" "0.000000"
Option "FSAAMSPosX5" "0.000000"
Option "FSAAMSPosY5" "0.000000"
BusID ""
EndSection
Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultDepth 24
SubSection "Display"
Virtual 1024 768
Depth 8
EndSubSection
SubSection "Display"
Virtual 1024 768
Depth 15
EndSubSection
SubSection "Display"
Virtual 1024 768
Depth 16
EndSubSection
SubSection "Display"
Virtual 1024 768
Depth 24
EndSubSection
EndSection