creating multiple indesign files using XML data

Hello Experts,

I have to create multiple id cards in Indesign using XML data. There are about 30 employees whose id cards have to be generated automatically from indesign using the XML data. The code that I have used in the XML file is,

<?xml version="1.0" ?>
<employee>
      <name>Robert</name>
      <designation>Branch Manager</designation>
      <phone>022-23937234</phone>
      <pic href="file://rob-img.jpg"></pic>
</employee>

I am able to generate individual cards after importing the XML into indesign. So for 30 employees I need to create 30 separate XML files and then import them individually into indesign and create the print file.  

But if I try to add all the 30 employees data in one single XML file and import this XML into indesign, though the XML data contains more than 1 employee data, indesign shows only the first employee's data on the page. (it does show all the elements in the structure view but I can attach only the first employee's elements to the frames on the page so only the first employees details are shown on the page)

ex xml file:

<?xml version="1.0" ?>
<employee id=1>
      <name>Robert</name>
      <designation>Branch Manager</designation>
      <phone>022-23937234</phone>
      <pic href="file://rob-img.jpg"></pic>
</employee>

<employee id=2>
      <name>Samarta</name>
      <designation>Executive</designation>
      <phone>022-23937234</phone>
      <pic href="file://sam-img.jpg"></pic>
</employee>


Is there any way of generating all the cards at one go instead of importing individual XML data of each employee separately? Can I have one single XML file with all the employees details like above and create all the cards at one go?

I have checked a few tutorials but none could solve my problem. Can anyone help me out with this?

Thanks in advance,
swiftguy