CP210x listed but not uploading

Hi, I am running without any issue UNO, Mega and NANO, but when I try to use Pro Mini or ESP8266-01 with CP210x VCP does not ulpoad the compiled file.
The point is, VCP is COM3 (W7 in devices like a mouse not a VCP) which is recognized and fully working with Arduino 1.6.x and LuaLoader for ESP8266, no problem. I can burn them everytime I want to, but in PIO shows error opening port .
Wiring is as follow : +5v for arduino or external 3V3 for ESP8266-01, GND , TX , RX , not DTS pin used.
Any hints please, thanks in advance