file uploader problem in asp.net

I have two users on our local network.  I'm trying to do the following:
System.IO.Path.GetDirectoryName(fuFileName.PostedFile.FileName).ToLower

On one machine I am getting the directory name.  On the other I am getting nothing.  I tried just printing out fuFileName.PostedFile.FileName.ToLower on the machine I can use the above statement on I'm getting the full path and file name.  On the other I'm getting only the filename.

The code is successful on several computers running ie7 and ie8 but this particular one (running ie 8) will not work.  I have read that secruity reasons will prevent the client path to be returned but then i also read it will work on the local network.  the reason I want it is because the file needs to come from one central location on the server.  I'm using the fileuploader control not really as a file uploader but as a file picker.

Hope this makes sense.  I'm thinking there is some security setting in ie 8 preventing this from working.
Fraser_AdminAsked:
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Robert SchuttConnect With a Mentor Software EngineerCommented:
If you don't really want to upload the file you may want to use client-side javascript to stop the file from being sent to the server. Also you can copy the file name to a hidden field so that your problem might be solved.

<html>
 <head>
  <script type="text/javascript">
   var savObject = null;
   function copyValue(oFile) {
    savObject = oFile;
    if (oFile.value != '') {
     oFile.form.elements['copiedFile'].value = oFile.value; // save full path to file in hidden form element
    }
   }
  function checkSubmit(oForm) {
   if (savObject != null) {
     savObject.disabled = true; // don't send file
     oForm.elements['sbm'].disabled = true; // prevent double click and also don't send value of button...
     return true;
    } else {
     return false;
    }
   }
  </script>
 </head>
 <body>
  <form name="fileUpload" method="post" action="save.php" onsubmit="return checkSubmit(this)">
   <input type="hidden" name="copiedFile">
   <input type="file" name="origfile" onblur="copyValue(this)">
   <br><br>
   <input type="submit" name="sbm" value="Save">
  </form>
 </body>
</html>

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Fraser_AdminAuthor Commented:
one other thing...this computer does not have any internet access.  the other computer that it works on do have internet access.  not sure if that is what could be causing the problem or not.  but it is the only thing other than the versions I have found that are different.
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CodeCruiserCommented:
What is the current security zone selected on IE8 on that computer? Is it same as other computers?
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