Support api issue

Support api issue

HI

I m executing following url for zoho support to insert record in zoho support account but it is giving me error 

"Unable to process your request. Please verify if the name and value is appropriate for the "xml" parameter"

i m using follwing url
https://support.zoho.com/api/xml/requests/addrecords?apikey=mykey&ticket=myticket& portal=demosupport & department=kawamedia & xml="<requests><row no="1"><fl val="Subject">Add Records Demo</fl><fl val="Contact Name">John</fl><fl val="Product Name">Customer Care</fl><fl val="Email"> john@demo.com</fl><fl val="Phone">002200330044</fl></row></requests>"
 

Can anybody kindly help me regarding this