Configuration Service with DataServers and Importing via BLS

Hi,

    I want to create a data server in SAP MII via a BLS transaction.

    So my understanding is that this can be done by using the following url:

     http://:/XMII/Illuminator?service=Configuration&mode=DataServers&type=Import&payload=<xml>

     I have tried to use the HTTP Post action block but I can seem to pass the correct payload.

     I got a sample payload by running via an http post  action block:

http://:/XMII/Illuminator?service=Configuration&mode=DataServers&type=Export

     Do I

     a.) Pass it into the URL or

     b.) Post command block

    So passing it in the URL I get an error of invalid characters

    Passing it into the Post field I just get an error that I need to supply the correct fields.

   Has anybody done this ? and how do I pass in the payload ?

Thanks