problem of authentication between cups and Windows 7

[juan]

hello to everyone..

i am new in this forums cups page, i have recently installed a windows 7 machine with a epson  share print, and configure the printer in cups
like these

DeviceURI smb://user:passwd@x.x.x.x/share

but not work

someting know what are i do wrong??
i have read about the authentication`s problems but wen i edit the authenctication policies in windows 7 nothing happen.