RC7620 Can not use FTP

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RC7620-1 +KFTPRCV Does not receive "CONNECT"

Hi, We are trying to download a file from FTP using AT+KTCPRCV on RC7620-1 (SWI9X07H_00.08.07.00 0ce4c1 jenkins 2021/03/17 02:18:20) After AT+KFTPCFG, we issue AT+KTCPRCV=1,255 and the data start coming down but no “CONNECT” is received before. According to “AirPrime - RC76xx - AT Command Reference Guide - Rev9.0.pdf” Page 276 a “CONNECT” or “NO CARRIER” should be sent by the module best regards