Invalid API key problem

Dear Zoho team,

I recently used zohos API in my web site. I used the same API key for ZOho sheet , show and editor. The zoho editor opens up smoothly without any problems. However the sheet and show give me these errors. I am using the remote API method. The errors are listed below:

Sheet:

RESULT=FALSE ERROR_CODE=2890 WARNING=The api key is invalid.

Show:

RESULT=FALSE
ERROR_CODE=3890
WARNING=API Key is not valid
-------------------------------------------------------------------------------------------
I have pasted the code below. The strange thing is that it works for the writer but not
for the other two.

<div>
<form method="POST" action="http://show.zoho.com/remotedoc.im?apikey=ed1ea0396d22a5e3e08e24114f12a54f&output=url" target="_self">
<input type="hidden" name="url" value="http://lahore.vistaclick.pk/save.php">

<input type="hidden" name="filename" value="samplePresentation.ppt">

<input type="hidden" name="id" value="12345678">

<input type="hidden" name="format" value="ppt">

<input type="hidden" name="persistence" value="true">

<input type="submit" value="Zoho Show" class="divbutton" name="submit">

</form>
</div>
<div>
<form name="myForm1" method="POST" action="http://sheet.zoho.com/remotedoc.im?apikey=ed1ea0396d22a5e3e08e24114f12a54f&output=editor" target="_self">

<input type="hidden" name="url" value="http://lahore.vistaclick.pk/docs/Test.xls">

<input type="hidden" name="saveurl" value="http://lahore.vistaclick.pk/save.php">

<input type="hidden" name="id" value="12345678">

<input type="hidden" name="format" value="xls">

<input type="submit" value="Zoho Sheet" class="divbutton" name="submit">
</form>
</div>
<div>
<form name="myForm2" method="POST" action="http://export.writer.zoho.com/remotedoc.im?apikey=ed1ea0396d22a5e3e08e24114f12a54f&output=editor" target="_self">

<input type="hidden" name="url" value="http://lahore.vistaclick.pk/docs/abc.txt">

<input type="hidden" name="saveurl" value="http://lahore.vistaclick.pk/save.php">

<input type="hidden" name="filename" value="abc.txt">

<input type="hidden" name="id" value="12345678">

<input type="hidden" name="format" value="txt">

<input type="hidden" name="persistence" value="true">

<input type="submit" value="Zoho writer" class="divbutton" name="submit">
</form>
</div>

Please look into it and let me know.
Regards
Abidoon