VBScript rest webservice调用返回与SoapUI不同的格式

I'm using VBScript to call a REST Webservice in a dataflow. When i test the webservice with soapUI it returns xml that i am able to parte with VBScript. But when i use Msxml2.ServerXMLHTTP.6.0 witn in my VBScript it returns data in different format that i cannot parse. I'm using VBScript to call a REST Webservice in