Hi

I've done all the procedures but i got some error messages within ettercap, i use BT 2.0 Beta, MSI s270 laptop.

Here is the output of ettercap

Code:
ARP poisoning victims:

 GROUP 1 : ANY (all the hosts in the list)

 GROUP 2 : ANY (all the hosts in the list)
Starting Unified sniffing...

DHCP: [00:40:D0:7A:FC:16] REQUEST 192.168.21.112
DHCP: [00:40:D0:7A:FC:16] DISCOVER 
DHCP: [00:40:D0:7A:FC:16] DISCOVER 
DHCP: [192.168.10.40] OFFER : 192.168.10.133 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
DHCP: [00:40:D0:7A:FC:16] REQUEST 192.168.10.133
DHCP: [192.168.10.40] ACK : 192.168.10.133 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.142 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
DHCP: [192.168.10.42] OFFER : 192.168.10.135 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.142 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.142 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.142 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.123 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.123 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
DHCP: [192.168.10.42] ACK : 0.0.0.0 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
DHCP: [192.168.10.40] ACK : 0.0.0.0 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
DHCP: [192.168.10.42] ACK : 0.0.0.0 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
DHCP: [192.168.10.40] ACK : 0.0.0.0 255.255.255.0 GW 192.168.10.1 DNS 192.168.10.40 
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 28 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 28 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 28 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 28 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 60 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 28 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
SEND L3 ERROR: 28 byte packet (0800:01) destined to 192.168.10.40 was not forwarded (libnet_write_raw_ipv4(): -1 bytes written (Operation not permitted)
)
Unified sniffing was stopped.
ARP poisoner deactivated.
RE-ARPing the victims...
i didnt get a new certicficate at the victims machine btw
victims, attacker and the router have communications eachother. (can ping eachother)

what is the problem?

btw i have got too much problems with that f.king laptop