weird problem with dm9000a on de2

my de2 stop responding shortly after boot up.

Uncompressing Linux... Ok, booting the kernel.
Linux version 2.6.19-uc1 (jwlam@localhost.localdomain) (gcc version 3.4.6)# 86 P
REEMPT Sun Mar 25 18:49:14 MYT 2007
uClinux/Nios II
Altera Nios II support (C) 2004 Microtronix Datacom Ltd.
setup_arch: No persistant network settings signature at 003F0000
Built 1 zonelists.  Total pages: 2032
Kernel command line:
PID hash table entries: 32 (order: 5, 128 bytes)
Dentry cache hash table entries: 1024 (order: 0, 4096 bytes)
Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
Memory available: 5560k/8192k RAM, 0k/0k ROM (1809k kernel code, 733k data)
Mount-cache hash table entries: 512
NET: Registered protocol family 16
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 1024 (order: 0, 4096 bytes)
TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP reno registered
io scheduler noop registered
io scheduler deadline registered (default)
Serial: JTAG UART driver $Revision: 1.3 $
ttyJ0 at MMIO 0x806810f0 (irq = 1) is a jtag_uart
<DM9KS> I/O: 806810f8, VID: 90000a46
usbmon: debugfs is not available
driver isp1362-hcd, 2005-04-04
isp1362-hcd isp1362-hcd: ISP1362 Host Controller
isp1362-hcd isp1362-hcd: new USB bus registered, assigned bus number 1
isp1362_hc_reset:
Clock not ready after 20ms
isp1362-hcd isp1362-hcd: irq 7, io mem 0x806810a0
isp1362_hc_start:
isp1362-hcd isp1362-hcd: ISP1362 Memory usage:
isp1362-hcd isp1362-hcd:   ISTL:    2 *  256:      512 @ $0000:$0100
isp1362-hcd isp1362-hcd:   INTL:   16 * ( 64+8):  1152 @ $0200
isp1362-hcd isp1362-hcd:   ATL :   32 * ( 64+8):  2304 @ $0680
isp1362-hcd isp1362-hcd:   USED/FREE:   3968       128
usb usb1: configuration# 1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ISP1362 Host Controller, irq 7
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
Freeing unused kernel memory: 600k freed (0x9d6000 - 0xa6b000)
Shell invoked to run file: /etc/rc
Command: hostname uClinux
Command: mount -t proc proc /proc
Command: mount -t sysfs sysfs /sys
Command: mount -t usbfs none /proc/bus/usb
Command: mkdir /var/tmp
Command: mkdir /var/log
Command: mkdir /var/run
Command: mkdir /var/lock
Command: mkdir /var/empty
Command: ifconfig lo 127.0.0.1
Command: route add -net 127.0.0.0 netmask 255.0.0.0 lo
Command: ifconfig eth0 192.168.1.12 netmask 255.255.255.0
Command: boa&
Command: inetd&
Command: cat /etc/motd
Welcome to
          ____ _  _
         /  __| ||_|
    _   _| |  | | _ ____  _   _  _  _
   | | | | |  | || |  _ \| | | |\ \/ /
   | |_| | |__| || | | | | |_| |/    
   |  ___\____|_||_|_| |_|\____|\_/\_/
   | |
   |_|
For further information check:
http://www.uclinux.org/
Execution Finished, Exiting
Sash command shell (version 1.1.1)
/> NETDEV WATCHDOG: eth0: transmit timed out
TX time-out -- dmfe_timeout().
/> ifconfig
eth0      Link encap:Ethernet  HWaddr 00:07:ED:00:00:00
          inet addr:192.168.1.12  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:26 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14 errors:1 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1962 (1.9 KiB)  TX bytes:812 (812.0 B)
          Interrupt:6 Base address:0x10f8
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:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:88 (88.0 B)  TX bytes:88 (88.0 B)

C:\Documents and Settings\SC>ping 192.168.1.12 -t
Pinging 192.168.1.12 with 32 bytes of data:
Request timed out.
Request timed out.
Reply from 192.168.1.12: bytes=32 time=8ms TTL=64
Reply from 192.168.1.12: bytes=32 time=2ms TTL=64
Reply from 192.168.1.12: bytes=32 time=2ms TTL=64
Reply from 192.168.1.12: bytes=32 time=2ms TTL=64
Reply from 192.168.1.12: bytes=32 time=2ms TTL=64
Reply from 192.168.1.12: bytes=32 time=2ms TTL=64
Request timed out.
Request timed out.
Request timed out.
Request timed out.

it did respond a few packets den went dead.

this situation only appears if i used hardware design that i recompiled myself. i only add a custom hardware in the sopc builder, auto assign the addresses, irqs, generate, and recompile de2_net. i din touch anything else in the sopc builder.

i am not having problem if i use the original de2_net. anyone has any idea?

Thx.