Hiwatch DS-H204Q ISAPI download video fragment

[realnt]

Hi! I need help! What I do wrong?

http://172.20.21.131/ISAPI/System/deviceInfo
Статус: 200
Отклик: <?xml version="1.0" encoding="UTF-8" ?>
<DeviceInfo version="1.0" xmlns="http://www.std-cgi.com/ver20/XMLSchema">
<deviceName>Embedded Net DVR</deviceName>
<deviceID>48383333-3839-3135-3831-4cbd8f9116be</deviceID>
<model>DS-H204Q</model>
<serialNumber>DS-H204Q0420170918CCWR833891581WCVU</serialNumber>
<macAddress>4c:bd:8f:91:16:be</macAddress>
<firmwareVersion>V3.5.20</firmwareVersion>
<firmwareReleasedDate>build 170814</firmwareReleasedDate>
<encoderVersion>V5.0</encoderVersion>
<encoderReleasedDate>build 170802</encoderReleasedDate>
<deviceType>IPC</deviceType>
<telecontrolID>255</telecontrolID>
<hardwareVersion>0x94200</hardwareVersion>
</DeviceInfo>

I can't download video from archive bt timestamp.

Isapi comand: /ISAPI/ContentMgmt/download

headers
("Content-Type", "application/xml");
("Content-Length", 156);


request body
<downloadRequest><playbackURI>rtsp://172.20.21.131/Streaming/tracks/101/?starttime=20180704T000000Z;endtime=20180704T000255Z</playbackURI></downloadRequest>

responce

<?xml version="1.0" encoding="UTF-8" ?>
<ResponseStatus version="1.0" xmlns="urnsialliance-org">
<requestURL>/ISAPI/ContentMgmt/download</requestURL>
<statusCode>6</statusCode>
<statusString>Invalid XML Content</statusString>
<subStatusCode>badXmlContent</subStatusCode>
</ResponseStatus>