Wired Internet Disconnecting! *HELP*

Well i posting it now from my Windows 7 (Did dual boot using Chemeleon 2).
Motherboard Name: Asus P5ND2-SLI
CPU Type: DualCore Intel Pentium D 925, 3000 MHz (15 x 200)
Chipset: North Bridge - nVIDIA nForce4 SLI Intel Edition (C19)
LAN: Intel 82540EM Gigabit
LAN controller Network Adapter: Intel® PRO/1000 MT Network
Audio Controller Type: nVIDIA MCP04
Codec Name: Realtek ALC850

Mac Version: iAtkos v7 | Leopard 10.5.8
Kernel: Voodoo Kernel 9.7.0(Solved the most of the problems)
Video Driver: CoreVidia 1.1
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Now for my problems(i have many but i will start with those at the computer : ):
1. Im booting to macintosh, everything goes well and after about 10 min my internet disconnecting(the router seems fine but my computer doesnt have internet untill i reboot.
Maybe this will help? i ran the console when the problem append:

12/17/09 4:14:00 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[82]) Exited: Terminated 12/17/09 4:14:00 PM com.apple.launchd[87] (com.apple.AirPortBaseStationAgent) Unknown key for boolean: EnableTransactions 12/17/09 4:14:05 PM Dock[103] _DESCRegisterDockExtraClient failed 268435459 12/17/09 4:14:06 PM…

I tried Apple Software Update because the problem accuring usually when downloading.

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2. I have no sound device and i tried everything to figure it out. [Solved]