classic ASP - control panel api

Any idea why the following won't work in ASP?
****
httpstring="https://api.discountasp.net/1.0/customerapi.asmx?op=Sql2000GetUsage&key=KEYSTRING&databaseName=DBNAME"
objHttp.open "GET",httpstring,true
xml=objhttp.responsetext
response.write(xml)
***
All I get back is the documentation for this function. Hmmm. Any help is greatly appreciated