Xbox360 only seeing some shared folders

I have an installation of Media Centre with two user profiles. I have 2
Xbox 360's and have connected each successfully to the Media Centre
however not all shared folders can be seen.

Profile 1 was set up first to the first 360 going to
www.xbox.com/pcsetup and installing the media connect app. This Xbox
can see the files in the media folders of My Documents and those in the
shared folders.

After logging into the second profile on the PC and switching on the
360 a notification told us it was detected and went through the same
setup and connect procedure. Again the default folders were shared (My
Document folders and the Shared folders). In each case all devices were
allowed access to these shares.

The problem is that the second 360 can only see the Shared Music,
Shared Videos, etc. regardless of what is added to the sharing list in
the media connect app in either profile.

There are two other observations that may be of issue. Profile 2's My
Documents has its security set to prevent other users looking at the
files within. This may explain why the 360 can't see the files but not
why it can't see other folders without security.

Also the device list shows three 360's although I can see from the MAC
address that the third device is the wireless bridge attached to the
second 360

Double-checking - is this with the Windows Media Connect functionality on
your Xbox 360? (vs. the Media Center Extender functionality)

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