Problems with offline files

Im having problems to make a share folder offline in VISTA, the laptop
is joined a 2003 domain.

First I was receiving the msg access denied, even I have full access
to the files but when I try to make them available offline I receive
the msg access denied. After 20 different tries (mapping by IP and
name server, disable and reenable offline files etc) I delete the
share and recreate it and now I dont receive any message.
But still not working, after I check the option "make av. off." I open
again the option is clear again. And for sure the files arent
available offlineThe server is 2003, but I try with a winxp and the
problem is there.

How can i solve this problem?