Standard Internet Explorer will not work in case of RFID ( read / write ) functionality.
RFID integration works more complex than Barcodes, We need ActiveX installed on handheld device to integrate RFID functions.
This is mostly available in Industrial Browsers like Wavelink or Pocket Browser. Standard IE is not sufficient to call RFID services.
Now, with ITS and RFID activeX, we need to write some Java Scripts to call those services. This is available in standard SAP as Device Include files ( SAP has coded only for Pocket Browsers!)
So, I would recommend to try calling the URL with one of the Industrial Browsers.
Let me know if you have questions.