Win2003 and XP and shared file with a permission to one user

[zillah]

I have got two PCs win2003 and XP,,,,,PCA and PCB (both PCs on my LAN through my linksys router WAG54G V2).

I created a folder on PCA (win2003), called "My Stuff",,,I created many users on PCA (employees, jsmith, test1, test2), I enabled sharing for the folder "My Stuff", and I gave permission (read only) to the username "employees" only, I deleted the username "Everyone" which is by default there.

1- From PCB (XP) , I opened run, then I typed in : \\192.168.1.64-----for win2003

2- Screen poped up (first time), I typed in the username:jsmith (not employees), the password:newsletter.

3- I was able to see "My Stuff", since it is shared folder, but I could not access, since jsmith has not been given permission to access it (only username "employees" has been given permission to access it ).

4- After that (second time, third time,,,etc), when I try to type in: \\192.168.1.64, I will be forwarded to a window with "My Stuff" folder (PCB still remember the previous session for username "jsmith"), I was not able to type in the username: test1, password: forum (because I have not greeted with a pop up screen!!!!),,,,,,,,,,What should I configure to let the (PCB) provides me with the pop screen for the new username (employees) ?

5- When I tried to type in : \\192.168.1.64\My Stuff (when I typed in only \\192.168.1.64 no erro message),,,,,,I received this error message :

\196.230.165.135\My Stuff is not accessible. You might not have permission to use this network resources. Contact the administrator of this server to find out if you have access permission.

[zillah]

I tried at work to redo the same scenario again with two PCs , my laptop (2003) and IBM Desktop (2003, not XP) (no domain, no AD, they are stand alone PCs,,,they are on the same LAN with public ip addresses,,,,).

from the Laptop I tried to access the Desktop , I received this erro message:

no network provider accepted the given network path

Note:
1- I can locate the folder, and access it from "My network place".
2- Ping ip address and computer name are ok.
3- There is no firewall within the LAN.