In app purchase is not working under android 2.3.6
<p>In my app I have integrated in app billing system and its working properly in the devices of 2.3.6 and above, but when I test it on 2.3.3 and 2.2.1 then in app billing is not triggered. I have used the following code to test in a button click listener:</p>

<pre><code>val = billingService.requestPurchase("android.test.purchased", payloadContents);
</code></pre>

<p>Is there any documentation that in which version should it run or any solution of it?</p>
