Documents Folder

Hi i have a three machine network running xp, main machine windows home,
others xp pro.

On the main machine i have created a folder called comman, and made folders
for usersnames, then i change the my documents folder on my main machine,
where all my work is stored, to my common folder.

I go to the other machines with no Doc's in the folder and change to my
common folder.

But when i go to open the folder i get a box saying guest and password. i
press return and open it. This has just recentally happened. does anyone
know why?

Also does anyone know of any Parental Control filters, were they software is
just installed on the main server machine and you then configure the client
machines to use this?

Thanks in Advance

Carl