Cannot Access XP PC

It is my fervent wish that one day that it will be far less trouble getting the basic computing needs to work without having to seek help. I cannot access the shared docs on the XP PC.I get the error \*****shared docs is not accessible etc etc. For some reason on the Win 7 PC under network I have 2 PC's with my name and 2 PC's with the XP PC's name, both the XP machines if double clicked show 3 printers,there is only one connected, and a shared doc folder.If I double click the shared docs I get the above error.I am using windows firewall on both PC'S and both have the same workgroup name.This is a fresh install of Windows 7.Everything is on in Windows 7 that should be on.Windows XP can access the 7 PC.