Try reposting this in the 'Q&A' forum. The 'Discussion' forum is for matters of general discussion, not specific problems in search of a solution. The 'Water Cooler' is for non-technical discussions. You can submit a question to 'Q&A' here:
https://www.techrepublic.com/forum/questions/post?tag=mantle_skin;content
There are TR members who specifically seek out problems in need of a solution. Although there is some overlap between the forums, you'll find more of those members in 'Q&A' than in 'Discussions' or 'Water Cooler'.
Be sure to use the voting buttons to provide your feedback. Voting a '+' does not necessarily mean that a given response contained the complete solution to your problem, but that it served to guide you toward it. This is intended to serve as an aid to those who may in the future have a problem similar to yours. If they have a ready source of reference available, perhaps won't need to repeat questions previously asked and answered. If a post did contain the solution to your problem, you can also close the question by marking the helpful post as "The Answer". .
[b]The XP User Account you are using is it an Administrator or Limited User Account?[/b]
If it's a Limited User Account you need to log in with an Administrator Account to get the change to stick.
Also what type of LAN is this?
Is there a Domain or Workgroup involved here?
If it's a Domain what is the Server Application in use?
Post the above when you ask the question and someone here should be able to help you. ;)
Col