ZOHO SHOW SUBMIT FORM PROBLEM!

ZOHO SHOW SUBMIT FORM PROBLEM!

I used Zoho show, through submitting a form like this :
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<form id="mainForm" method="POST" action="http://show.zoho.com/remotedoc.im?apikey=[myapi]&output=view&format=ppt" target="_self" onload="this.submit()" >
<input type="hidden" name="filename" value="myfile.ppt">
<input type="hidden" name="url" value="[myurl]">
<input type="hidden" name="id" value="111111">
</form>
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it works fine for the since i used it, but lately it seems that is not working, when you submit a form you just get at the status bar (transferring from show.zoho.com) for a while then nothing happened, just Done!!, is there any problems with Zoho show when submitting a form

please, thanks in advance!
Ahmad