Windows Media Player Sharing Problems

I have two computers, one with Windows XP Home x86, and one with Windows Vista Home Premium x64. When I select to share my media through Windows Media Player (click on the arrow under library and select Media Sharing), I have problems. On my XP I can select Vista to allow sharing to, but on my Vista I cannot see my XP. On my Vista I can see my XP, but on my XP I cannot see my Vista. I am not sure which system is the problem though. I do not get it, my XP can detect and share with my Vista, but my Vista cannot share with or detect my XP. Why can't I share my media from Vista to XP?

EDIT: Well sadly, I found this link below published by Microsoft saying that Windows Media Player 11 for Windows XP cannot browse other shared Windows Media Player 11 libraries. I guess I will just have to manually share it.
http://www.microsoft.com/windows/windowsmedia/player/faq/sharing.mspx#q20:1