Over the Thanksgiving break, I helped my grandmother with some things with her computer. One of the problem is that on one of her new computers, her account name was spelled differently than it was on the Windows Home Server. This causes her to be prompted for her username and password when she tries to mount the server.
Unfortunately, in Windows, you can change the display name for an account, but you cannot change the username. In order to fix this, you need to create a new account with the right username, and then copy all of the files to the new home directory.
Since when you create a new account on windows, the control panel doesn't offer the ability to specify the username and display name. I would recommend that when you create a new account, you create an account and specify the username. Then after the account is created, change the name to the name you want displayed (This only changes the display name)