Professional vs Home edition

I am setting up a new PC for my church and am having difficulty getting a logon screen to display. I can see the network and the computers in my workgroup. I can not, however, get a login screen so that all my my drive mappings are set on logon. The only thing I can see that might be different from the other ones I set up is that the problem pc is running XP Home edition instead of XP Professional. Is XP Home edition limited when it comes to this? Suggestions?