XML feed xml with mws api using PHP Client Library

Hello I am new to Amazon API, I want to list my products using MWS API product feed from my own HTML application.I have downloaded Developer Resources from here

https://developer.amazonservices.com/api.html?group=bde&section=feeds&version=latest

1.Edited ".config.inc.php" from \src\MarketplaceWebService\Samples

2.Changed AWS_ACCESS_KEY_ID,AWS_SECRET_ACCESS_KEY and MERCHANT_ID

3.Edited SubmitFeedSample.php file and followed instructions and removed comments accordingly and changed method to _POST_PRODUCT_DATA_

4.Followed the tutorial present in "Selling on Amazon Guide to XML" to Generate this XML

<?xml version="1.0" ?>
<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
<Header>
<DocumentVersion>1.01</DocumentVersion>
<MerchantIdentifier>mymerchantid</MerchantIdentifier>
</Header>
<MessageType>Product</MessageType>
<PurgeAndReplace>true</PurgeAndReplace>
<Message>
<MessageID>1</MessageID>
<OperationType>Update</OperationType>
<Product>
<SKU>720656549</SKU>
<DescriptionData>
<Title>GIRLS S/S PRINTED COTTON AND PLITED FROCK WITH CONTRAST FRONT BELT AND BOW</Title>
<Brand>mybrand</Brand>
<Description>The Girls Racer Back Neck Tie up Tunic from Oye is the perfect choice to dress your little girl while heading out for the day.It is made of soft and pliable material, which ensures to keep her fresh and comfortable throughout the day.Pair this dress with cute ballerinas and matching hair accessories to complete the casual look.</Description>
<BulletPoint>Made in India</BulletPoint>
<BulletPoint>500 thread count</BulletPoint>
<BulletPoint>plain weave (percale)</BulletPoint>
<BulletPoint>100% Egyptian cotton</BulletPoint>
<Manufacturer>mybrand</Manufacturer>
<SearchTerms>clothes</SearchTerms>
<SearchTerms>baby girl</SearchTerms>
<ItemType>Girls</ItemType>
<IsGiftWrapAvailable>false</IsGiftWrapAvailable>
<IsGiftMessageAvailable>false</IsGiftMessageAvailable>
</DescriptionData>
<ProductData>
<Home>
<Parentage>variation-parent</Parentage>
<VariationData>
<VariationTheme>Size-Color</VariationTheme>
</VariationData>
<Material>cotton</Material>
<ThreadCount>500</ThreadCount>
</Home>
</ProductData>
</Product>
</Message>
<Message>
</AmazonEnvelope>

5.Tested this XML in MWS Scratchpad and the result is

 Response (200)
<?xml version="1.0"?>
<SubmitFeedResponse xmlns="http://mws.amazonaws.com/doc/2009-01-01/">
<SubmitFeedResult>
  <FeedSubmissionInfo>
    <FeedSubmissionId>50081******</FeedSubmissionId>
    <FeedType>_POST_PRODUCT_DATA_</FeedType>
    <SubmittedDate>*********</SubmittedDate>
    <FeedProcessingStatus>_SUBMITTED_</FeedProcessingStatus>
  </FeedSubmissionInfo>
</SubmitFeedResult>
<ResponseMetadata>
  <RequestId>*****************</RequestId>
</ResponseMetadata>
</SubmitFeedResponse>

6.Added this XML code in "SubmitFeedSample.php" on $feed variable(line 99)

7.Uploaded all files of "PHP Client Library" on my hostgator server

8.Browsed to the file in firefox

9.In firefox it shows "FeedProcessingStatus SUBMITTED" in service response.

But after doing all this I am unable to see product in my "Manage Inventory" on seller central account.

and last thing how to use "_POST_PRODUCT_IMAGE_DATA_" and its xml(as shown in XML guide) in SubmitFeedSample.php simultaneously with "_POST_PRODUCT_DATA_"

Please help as their are no simple tutorials or videos to demonstrate the exact process.

You need to do two things:

1. Check if the feeds you submitted actually get processed successfully
2. As a minimum, you need to send 3 feeds: product data, pricing and stock quantities. After those three feeds are processed, the items will show up in Seller Central. More details here: Correct Amazon MWS flow for item with existing ASIN