Pluto SDR sink and TCP Source in GNU Radio

Hi, I'm trying to create a flowgraph with a TCP Source block and a Pluto sink to tx the packet.

From the Freq. Sink seem to transmit but if I try to received the modulated signal with another Pluto it is absent.

Currently, I'm running the flowgraph in Ubuntu 19.04 and GNU Radio ver. 3.7.13.4.

Any suggestion?