Ubuntu 11.10 can't connect with wifi

Hey I didn't use my computer for 4 days and when I returned yesterday I got a problem... I cant connect with my network. Ubuntu shows all networks but it can't connect with them. I dont know why. I have normal internet only while it's trying to connect and when I type Code: /etc/init.d/networking restart it shows: Code: root.muhahaha:/home/karol# /etc/init.d/networking restart  * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces  * Reconfiguring network interfaces...                                          Plugin rp-pppoe.so loaded. PPP session is 45 Connected to 00:0c:42:b1:24:ca via interface wlan0 Using interface ppp0 Connect: ppp0 <--> wlan0 CHAP authentication succeeded peer from calling number 00:0C:42:B1:24:CA authorized local  IP address 82.160.78.217 remote IP address 10.0.0.2 primary  DNS address 10.0.0.2                                                                         [ OK ] Its just 1 - 2 mins. I have windows on other partition too and everything is good there. What should I do? I tried with wicd but it cant connect too sorry for my english

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