Windows XP User cannot connect to OS X Server... Keeps asking for password.

I have made my iMac G5 into a server. It is running OS X Server 10.5.7 with all updates. Only use it for file sharing. Have it setup as a standard server. Only have two users and can verify that SMB is running through the Server Admin application.

I use XP Pro with SP3 on my MacBook Pro. Both machines have relativley fresh installs that are unaltered. Both the windows side of my laptop as well as the SMB are set to the same workgroup.

When I am in XP I do the following:

1. Double click on My Network Places

2. In the My Network Places Window I click on the left hand column: View Workgroup Computers

3. I see my server: iMac Server (Imacserver)

4. Double click that icon... get a user login window with the title: Connect to imacserver.private

5. Input my user name and password (the same that I would use while in Leopard... which works fine) - Click OK.

Here is what I don't understand.

6. The login window comes back after about 10-15 seconds. As if the login was incorrect to try again.

7. The user name field now has in front of my name the name of the 'PC' forward slash my user name?? For example: MACPC24335\username


Why can I not connect to my server... in leopard it is very seemless and works fine... I feel that I am over looking something. Any thoughts or ideas as to why this is not working?

Thank you for your time.