Vista Home Basic Shares

I have 5 pc's setup with Home Vista Basic. I setup one PC to share its
files. I can access the files from all the pc's but when I try to
access the same file more then once vista will just sit there until the
first session is closed.

With excel you can open up a file on one pc and then you should be able
to open it from another with read only access but this does not work.
This is the same with word or access.

I did try the Business version of vista and I did not have this
problem. Does Vista Home basic have a bug with file sharing to multiple
pc's?

It suppose to allow 5 concurrent useres, which it does but will not let
me share one file to multiple users at the same time. Any Ideas ?


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RJS