Not connect the mqtt server

Technical Subjects Software General Function
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I am connect the AWS iot core using MQTT connection in GSM network
AT+QMTOPEN=0,“URL”,8883
OK
QMTOPEN: 0,0
connected but
AT+QMTCONN=0,“thingname”
ok
QMTCONN: 0,1
QMTSTAT: 0,3 not connected please solve the error

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