WindowsXP IE8 unable to access saved sheets.

WindowsXP IE8 unable to access saved sheets.

I have found your service very useful.  However, I have been unable to access my work since zoho released version 3.0 from my WindowsXP IE8 machine.  I can from my Vista or Windows7 machines, although much more slowly than before.  In WindowsXP IE8, the sheet opens briefly, but immediately displays a yellow warning: Connection to server lost, please click here to reconnect, or something to that effect.  But no matter how many times I try, the response is always the same.  The spreadsheet has 4 tabs.  If I create a new simple 1 tab sheet, it operates fine.  Also, there seems to be some huge demand on the processor, as the fan comes one and stays on as long as I am connected to zoho.  No other websites produce such a result.
 
I am hopeful you might be able to find a way I might continue to access your wonderful service from my main home desktop WindowsXP IE8 machine.
 
Thank you.