Accessing user account on MCE

Hello:

I have a small network 4 computers all with trusted users. Each computer has
the same account names and I have shared the c drive because we need each
user to have access to all the contents of each mahcine.

Here is my problem.

3 of my machines are XPHome.
1 of my machines is XP Media Center Edition.

I can log into any computer from any computer and get what I need. However
there is one quirk. Any machine can access the C:\Documents and
Settings\user name of any other computer that is running the Home Edition
but the Media Center Edition will not allow access to the user account from
any of the other machines. However I can get into the C: drive or other
folders just not the user folder.

Any answers to this issue would be appreciated.

Thanks