Beaglebone Black doesnt connect to internet

I’ve tried everything, from every forum. But none worked for me. I cant ping 192.168.7.1 and rfkill didnt worked too. When i type ifconfig i got:

eth0 Link encap:Ethernet HWaddr d0:39:72:3b:6b:e7
UP 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)
Interrupt:40

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:65536 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:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

usb0 Link encap:Ethernet HWaddr c2:80:8f:92:ba:fc
inet addr:192.168.7.2 Bcast:192.168.7.3 Mask:255.255.255.252
inet6 addr: fe80::c080:8fff:fe92:bafc/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1176 errors:0 dropped:0 overruns:0 frame:0
TX packets:703 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:233152 (227.6 KiB) TX bytes:245853 (240.0 KiB)

When i connect the ethernet cable i dont get any ip.

Someone faced the same problem ??