DE-nano-soc ethernet not working


I’m trying to finish ‘DE0-Nano-SoC_My_First_HPS’ but I created new SD Card, loaded HPS default bitstream from CD but when I plug ethernet cable between my Laptop and DE0-nano-soc i have problem with ethernet. LED’s don’t blinking at PHY connector. I checked cable it’s ok? Anybody have any ideas?

BOARD : Terasic  DE0_Nano_SoC Version-A Board
I2C:   ready
DRAM:  1 GiB
In:    serial
Out:   serial
Err:   serial
Net:   mii0
Hit any key to stop autoboot:  0
Waiting for PHY auto negotiation to complete............. TIMEOUT!
ENET Speed is 10 Mbps - HALF duplex connection
Using mii0 device
ping failed; host is not alive

socfpga login: root
root@socfpga:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:aa:bb:cc:dd:ee
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:592 (592.0 B)

root@socfpga:~# udhcpc
udhcpc (v1.20.2) started
Sending discover...
Sending discover...
Sending discover...
Sending discover...
Sending discover...

if you don’t have a router between your laptop and the board you need to set a custom ip, like for the board and for the laptop Ethernet adapter
"udhcpc" is used when you have the board connected to a DHCP server

I had just tried connect the board with my laptop using the cross-over cable using the ifconfig eth0 to set a ip address for my board. Initially the connection is established and i can scp files from my laptop to the board. However, after a few times, it wont work anymore. When I try to scp files to the board, it show the following message:

$ scp -vvv INTERN_DEMO root@
Executing: program /usr/bin/ssh host, user root, command scp -v -t /home/root
OpenSSH_6.8p1, OpenSSL 1.0.2a 19 Mar 2015
debug2: ssh_connect: needpriv 0
debug1: Connecting to [] port 22.
debug1: connect to address port 22: Connection refused
ssh: connect to host port 22: Connection refused
lost connection

Kindly advise me on how to solve this issue please. Cross over cable is much more portable than router…