Transmitter and Receiver on the same SDR

[Oğuzhan Gedikli]

Hello, I have USRP B200 and i use GNU Radio for design. I want to transmit a 
random signal (whatever, is'nt important for now) I am using the TX/RX port as 
transmitter and the RX2 port as receiver. I can transmit signal without any 
problems but i can't receive it from other port. I am sending screenshots to 
you. If you are help me, i would be glad. Thank you.