network

[binglis]

I have just built a new system using windows xp 64 bit. Prior to putting windows in I installed a debian linux system. This installed no problem. I then partitioned my disk and installed windows xp 64 bit system, leaving enough room on my harddrive to install debian. On installing debian I noticed that the dhcp network would not work or a static network. I still installed the linux and decided to remove the cmos battery. I could then go into linux and the network worked fine. I then re-booted and went into windows partition and this worked fine also. Tried to go back into linux and the static and dhcp network didnt work again. I removed the battery and both then worked.
Can someone explain why this is happening. The motherboard I am using is GA-K8N51GMF-9.
Thanks for any help
Bill
Will also add after the battery was removed I ran ifconfig an got following results
eth0 Link encap:Ethernet HWaddr 00:14:85:C8:75:62
inet addr:192.168.1.201 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::214:85ff:fec8:7562/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:18 errors:0 dropped:0 overruns:0 frame:0
TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2235 (2.1 KiB) TX bytes:1818 (1.7 KiB)
Interrupt:177

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:272 (272.0 b) TX bytes:272 (272.0 b)

After I booted in windows and then went back into linux the ifconfig read
eth0 Link encap:Ethernet HWaddr 00:14:85:C8:75:62
inet6 addr: fe80::214:85ff:fec8:7562/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1556 (1.5 KiB) TX bytes:0 (0.0 b)
Interrupt:177

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:7 errors:0 dropped:0 overruns:0 frame:0
TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:372 (372.0 b) TX bytes:372 (372.0 b)

The network address has altered. Does this help
Thanks again
bill