How do I do an autologin in jasperreport 7.1.0?

[mau_gorilaz]

I have an autologin that works perfectly in version 6.2.1 and when it comes to change to version 7 I can not make the connection

objHTTP.open "POST", "http://localhost:8080/jasperserver/flow.html?_flowId=viewReportFlow&standAlone=true&reportUnit=" & ruta_reporte & "&output=" & tipo_archivo, false

parametros = "WHERE=" & Server.URLEncode(parametro_where) & "&j_username=<jasperadmin>&j_password=<password>"

This is the line of code that generates the connection and when I remove some parameters only I get the login screen of the jasper
Somebody could help me?