Alter the configuration on my computer which uses Windows XP OS

Dear experts, we would like to be informed on how I can alter the configuration on my computer which uses Windows Xp operating system so that it functions with roaming file. My company has some customers using our Xp. Surprisingly,some of them are capable of using the roaming file from our server but others are not capable of doing so.The server we own is server 2008. I decided to check up on the profile of those who can access roaming file and I found that they use local stashed profile. I highly need your assistance since I cannot even select the domain profile because it has been deactivated; this hasn’t been possible even after searching and working on the advanced computer settings.
