Good dys dear friends, thank to you all for your helping collaborations.
Anyways here is my problem occured,

I downloaded latest BT4 and trient MITM via ettercap.
Connected to my AP (my own network, all works fine) via wireless and used cmd

"ettercap -T -q -p -M ARP // // -i wlan0"

sniffing started. Then I tried to test another wireless connected (Vista OS installed) laptop and did an FTP connection to a server then ettercap grabbed password & username. Wonderful.

But unfortunately HTTP, TELNET, POP sniffing is not working. Couldnt grab passwds and more.

Hope someone has an experience on that situation.
Thanks and regards.