Windows 7: Plz Plz Help Me...

Machine 1 = Pentium4 (Windows XP)
Machine 2 = Pentium4 (Windows XP)
Machine 3 = Core2Quad (Windows7 Ultimate)
i have connected All PC,s With a Simple Ethernet Switch.

Before installing Windows 7 i was having All PC,s WIth Windows XP. And i was uncheck Simple File Shearing.... As i have installed all PC,s Windows and i am admin of this network i can access all pc,s HDD,s With SImple Command Like

\\192.168.0.1\D$
\\192.168.0.2\D$

after it it ask me login and pwd and i put admin login and pwd and drive shown to me...

Now Come to the point... as i installed windows7 on machine 3 and open an XP PC (Machine1) same as command

\\192.168.0.2\d$
Machine 3 ask me the login and pwd ..so i put the login and pwd but it said

Login Failure: Unknown username or Bad Password..

then i go to machine 2 (XP) and OPen Machine 2 (XP) it is opening with admin login and pwd...

plz help me i am unable to open Admin Shearing Like C$ d$ E$ of windows XP drivers on windows7...
also i told you i dont set any domain on my network and it is a simple network.
Quick Help will be appriciated....

Regards
Fahad
but when i open

Hi.

If the machines have the same user account name but different passwords, make the passwords the same.

Or you could do it another way too.

Create a brand new user name with a brand new password.

If both machines have same user name but different passwords, sharing will not work.

i have set both XP machines same user and pwd... Like

XP MACHINE 1 = Login Administrator Pwd = okok123
XP MACHINE 2 = Login Administrator pwd = okok123

it is working if i open xp machine on another XP Machine

But i open xpmachine on windows 7

it said same login failure...

Plz help me out