Problem to connect AudioCast M5

Hello Community!

I have a problem with the connection of an audiocast M5 (audio transmission via wifi), for a moment it connects and then usually gets lost, I have tried only connecting the access point and everything is great, the problem is generated when I connect the mikrotik.

I have configured HotSpot, I have configured the access by IP BINDING without results, I can ping the device and access its WEB configuration, but the mobile application and foobar2000 does not detect the device, likewise I have problems with chromecast.

The device that I have at home is an RB750gr3 and access point (TLWR941HP - TPLINK).

I would really appreciate it if you can help me, sorry for my bad English.