espressif esp-at: query commands dont work

[kjartani]

I have installed esp-at succsessfully.
Sending at commands from mega2560 over serial to esp32 to is working.
But querying commands eg.: esp_send("AT+CIPSTA?"); ( esp_send() is a function sending data to esp32 ).
The result should be +CIPSTA:<ip> OK, according to the "ESP32 AT Instruction Set and Examples" but nothing is returned.
What can be wrong?

Regards
Kjartan Iversen