I have been trying to reconfigure my eth0 and wlan0 interfaces by editing /etc/network/interfaces file as folows:

auto lo
iface lo inet loopback

auto eth0 
iface eth0 inet static
    address 192.168.1.11
    gateway 192.168.1.1
    netmask 255.255.255.0
    network 192.168.1.0
    dns-nameservers 193.2.1.66

auto wlan0
iface wlan0 inet static
    address 192.168.1.10
    gateway 192.168.1.1
    netmask 255.255.255.0
    network 192.168.1.0
    dns-nameservers 193.2.1.66
    wpa-driver wext
    wpa-ssid lausi
    wpa-ap-scan 2
    wpa-proto RSN
    wpa-pairwise CCMP
    wpa-group CCMP
    wpa-key-mgmt WPA-PSK
    wpa-psk 8952a447c860d13847ba1cabd15314ba9caf2fb207f19598f90c43fcd43c0d97

But my wireless doesnt work when i use command /etc/init.d/networking restart and when i do this i get an error:

* Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
* Reconfiguring network interfaces...
RTNETLINK answers: File exists
Failed to bring up eth0.
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
RTNETLINK answers: File exists
Failed to bring up wlan0.

Although it clearly states that my eth0 interface couldn't be brought to life it is working! But i cant say this for the wlan0 interface which doesn't even work if i unplug internet cable and again use command /etc/init.d/networking restart. This seems weird to me...

When i use ìfconfig -a command i get an output which confirms that wlan0 isnt working and eth0 is.

ziga@ziga-cq56:/etc/network$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 60:eb:69:6f:5f:69  
          inet addr:192.168.1.11  Bcast:192.168.1.13  Mask:255.255.255.0
          inet6 addr: fe80::62eb:69ff:fe6f:5f69/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6764 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6641 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:5932190 (5.9 MB)  TX bytes:1331846 (1.3 MB)
          Interrupt:42 Base address:0xc000 

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:1759 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1759 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:107772 (107.7 KB)  TX bytes:107772 (107.7 KB)

wlan0     Link encap:Ethernet  HWaddr 70:f3:95:e7:57:cc  
          inet addr:192.168.1.10  Bcast:192.168.1.12  Mask:255.255.255.0
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 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:0 (0.0 B)  TX bytes:0 (0.0 B)

How can i make my wlan0 interface work? It had been working previously with network manager and wicd...