JACOB: ComFailException

Hi!

I am using JACOB to automate Ms-Word. but when i am adding/opening a
document it shows an exception.
MS-Word get opened and visualized but no document has been opened
there.
Plz help me to sort out this problem.

<b>Code:</b>
ActiveXComponent dc = new ActiveXComponent ("Word.Application");
     try
        {
     dc.setProperty("Visible", new Variant(true));

               //I've tried this way also, but in vain
               //Dispatch documents = Dispatch.get(dc,
"Documents").toDispatch();

     //This line generates exception.
                Dispatch documents =
dc.getProperty("Documents").toDispatch();
     Dispatch document = Dispatch.call(documents,
"Add" ).toDispatch();

     }
     catch (Exception e) {
     e.printStackTrace();
     }

<b>Exception:</b>
       com.jacob.com.ComFailException: Invoke Failed: Documents
    at com.jacob.com.Dispatch.invokev(Native Method)
    at
com.jacob.activeX.ActiveXComponent.getProperty(ActiveXComponent.java)
    at Word.getDocuments(Word.java:17)
    at WordDoc.main(WordDoc.java:20)