Live Updates not getting refreshed in excel collaboration.

Hi,

I am trying to collobarate an excel document between two users. I am not looking for saving the file now. i just want to see the live update and chat window. I will list out what i have done. First i created an HTML file as below

<html>
<form method="POST" action="http://sheet.zoho.com/remotedoc.im" enctype="multipart/form-data" target="_self" accept-charset="UTF-8">
File : <input type="file" name="content" size="38"> <br>
<input type="hidden" name="apikey" value="my api key">
<input type="hidden" name="output" value="url">
<input type="hidden" name="mode" value="collabedit">
<input type="hidden" name="filename" value="test file name">
<input type="hidden" name="lang" value="en">
<input type="hidden" name="id" value="101">
<input type="hidden" name="documentid" value="1000">
<input type="hidden" name="format" value="xls">
<input type="hidden" name="saveurl" value="http://www.inautix.com:8080/pdftest/jsp/test.jsp">
<input type="submit" name="submit" value="Open/Edit"></form>
</html>

I opened this up in IE, i selected a excel file and clicked on "open/edit".

I got the below response

RESULT=TRUE
URL=http://sheet.zoho.com/editor.do?doc=5246d88da55a3764a31781e5cdeac16c7744e5720ac2f12c4f02d440682c1dba8ab06ba5a479ddec&lang=en
DOCUMENTID=1000


I opened the url 
http://sheet.zoho.com/editor.do?doc=5246d88da55a3764a31781e5cdeac16c7744e5720ac2f12c4f02d440682c1dba8ab06ba5a479ddec&lang=en
in both IE and firefox. I got the excel sheet showed up.

but when i edit in any one of them, i dont see the updates reflected in the other one.
Also i dont see anyone in the chat window also.

After this i did the following,

i opened this url in IE, and in firefox i opened the following. i gave the same documentid that i got from response, i changed username and i changed the output to editor

<html>
<form method="POST" action="http://sheet.zoho.com/remotedoc.im" enctype="multipart/form-data" target="_self" accept-charset="UTF-8">
<input type="hidden" name="apikey" value="myapikey">
<input type="hidden" name="username" value="User 2">
<input type="hidden" name="documentid" value="1000">
<input type="hidden" name="id" value="101">
<input type="hidden" name="output" value="editor">
<input type="hidden" name="mode" value="collabedit">
<input type="hidden" name="saveurl" value="http://www.abc.com:8080/pdftest/jsp/test.jsp">
<input type="submit" name="submit" value="Open/Edit"></form>
</html>

this again opened an editor window, and even in that i dont see anyone in the chat window and also the changes dont get reflected.

Please let me know what might be the problem, what am i doing wrong? am i missing anything?

Expecting your answer soon, please help me.

Also pls tell me if i have to check whether any url is being blocked by my enterprise firewall?

Thanks and Regards.
Dinesh.