problem in file uploading

problem in file uploading

while uploading file into quotes module  i am getting the following error.

https://crm.zoho.com/crm/private/xml/Quotes/uploadFile?authtoken=".$authtoken."&scope=crmapi

file path :  http://creatorexport.zoho.com/DownloadFile.do?filepath=/1355384663709_theater-in-the-round.jpg&sharedBy=adithya1&appLinkName=ibanquet-lab&viewLinkName=room_templates_View

<
response   uri = "/crm/private/xml/Leads/uploadFile" >
  < error >
< code >
4424
</ code >
< message >
Unable to process your request. Please verify whether you have provided proper file.
</ message >
  </ error >
</ response >

if any help would be appreciated