Why can't you mount a windows share in linux and make it writable?

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http://serverfault.com – I don't know what else to try... The share in Windows has permissions to "Everyone" set to read/write, which shouldn't matter because I am mounting the share using the administrator name and password. I am also using -o rw in the mount declaration. I have tried about a dozen different variations of the mount statement and none of them have produced a writable directory. Is there ANYTHING else I can try? EDIT Windows Server 2008 R2 holds the share in question. mount -t smbfs -o username=[Administrator],password=[password],rw // /media/windows is the declaration that (HowTos)