Insert leads under a campaign

Insert leads under a campaign

hello 
how can i make to insert lead in Campaign with API ?

on the web there is  http://www.zoho.com/crm/help/api/updaterelatedrecords.html but don't run with lead, do you have a solution ?

i write

https://crm.zoho.com/crm/private/xml/Leads/updateRelatedRecords?authtoken=5a265c485AZERTY7a350fbee3f66&scope=crmapi&relatedModule=Campaigns&id=769051000000185017&xmlData=<Campaigns><row="1">
<FL val="CAMPAIGNID">769051000000176005</FL>
</row>
</Campaigns>

i have error 

<response> <error> <code> 4600 </code> <message> Unable to process your request. Please verify if the name and value is appropriate for the "xmlData" parameter. </message> </error> </response>


thanks