REQUEST DOCUMENT (response number 501)

Hi all,
I like to upload a file, e.g. test.txt into one of the server folder with virtual folder named “files”.

so, i code:
REQUEST DOCUMENT FROM “http://IP_Add/files/test.txt”
DATA ALL #document
PAGE #Resultxml

but no file create and reponse number return is 501 (Required not supported.) but i try this same syntax under my development machine is just work fine. y this happen? thanks.
p/s: my server is using window server 2003 service pack one, while my developement machine is window xp.

Hi all, no issue already…
just need to “allow” the status of my “web service extension” in IIS. thanks