8518 error

when i put data to reports by request.
i got an error for that

−

8518
You need to (re)login to perform this operation

and my request url is

http://reports.zoho.com/api/sihanjishu/seven/use?ZOHO_ACTION=ADDROW&ZOHO_OUTPUT_FORMAT=XML&ZOHO_ERROR_FORMAT=XML&ZOHO_API_KEY=mykey&ticket=mytickt&ZOHO_API_VERSION=1.0' -d '&user=xxxxxx&host=fsfefsfsef&svn=fsefefsefff&version=201003142307&action=test