Xml layout example

Xml layout example

Would you please have a xml example for multiple record updates method?, I did one like this:
<?xml version = "1.0" encoding = "UTF-8"?>
<Leads>
    <row no="1">
<FL val="Id">2000000178701</FL>
<FL val="Company">Company1</FL>
<FL val="Last Name">Last Name1</FL>
<FL val="Email"> automation@crm.com 1</FL>
    </row>
    <row no="2">
<FL val="Id">2000000178702</FL>
<FL val="Company">Company2</FL>
<FL val="Last Name">Last Name2</FL>
<FL val="Email"> automation@crm.com 2</FL>
    </row>
</Leads>

But the response is: "Problem occured while processing the request"

Regards