Channel.Connect.Failed error NetConnection.Call.Failed: HTTP: Status 404

[mangrove]

Hi all,

I uploaded my app to server and i get an error message:

[RPC Fault faultString="Send failed" faultCode="Client.Error.MessageSend" faultDetail="Channel.Connect.Failed error NetConnection.Call.Failed: HTTP: Status 404: url: 'http://www.gis.net.vn/weborb.aspx'"]

I checked witch Charles and it shows some respones (in General tab):

URL: http://www.gis.net.vn/weborb.aspx
Status: Failed
Failed: Remote server closed the connection before recieving request header
Response code: -
Protocol: HTTP/1..1
Method: POST
Content type: -
Client Address: /127.0.0.1
Remote Address: -

I don't know what's mean above parameters.
Please help me