Can i insert products with description on SalesOrders/Invoices?

hello,

I'm trying to use insertRecords to create a new SalesOrder.
I would like to add a description for each product item in Product Details section.

It basically works fine using the XML below, except that no products description can be inserted.
Is the insertRecords API doesn't support to insert product description?

<SalesOrders>
<row no="1">
<FL val="Subject"><![CDATA[TESTING]]></FL>
<FL val="Contact Name"><![CDATA[Reeve Lin]]></FL>
<FL val="Sub Total"><![CDATA[555.0]]></FL>
<FL val="Description"><![CDATA[Description of Orders]></FL>
<FL val="Product Details">
<product no="1">
    <FL val="Product Id">306902000000076107</FL>
   <FL val="Unit Price">555.0</FL>
   <FL val="Quantity">1.0</FL>
   <FL val="Quantity in Stock">0.0</FL>
   <FL val="Total">556.0</FL>
   <FL val="Discount">0.0</FL>
   <FL val="Total After Discount">555.0</FL>
   <FL val="List Price">556.0</FL>
   <FL val="Net Total">556.0</FL>
   <FL val="Tax">0.0</FL>
    <FL val="Description"><![CDATA[Description of product1]]></FL>
</product>
<product no="2">
    <FL val="Product Id">306902000000076135</FL>
   <FL val="Unit Price">9000.0</FL>
   <FL val="Quantity">2.0</FL>
   <FL val="Quantity in Stock">0.0</FL>
   <FL val="Total">1000.0</FL>
   <FL val="Discount">0.0</FL>
   <FL val="Total After Discount">555.0</FL>
   <FL val="List Price">9000.0</FL>
   <FL val="Net Total">556.0</FL>
   <FL val="Tax">0.0</FL>
    <FL val="Description"><![CDATA[Description of product2]]></FL>
</product>
</FL>
</row>
</SalesOrders>

Thanks!