I have followed all the instructions on my Xbox 360 and I cannot get it to recognize my pc. I enabled sharing in the options menu of Windows Media Player 11. WMP 11 sees the 360 and it is checked. The 360 does not see my pc. I am using a Linksys BEFSX41 router which has built in Firewall. I am running XP with service pack 2. I have done all updates. I also had Zonealarm on, I disabled it, that didn't do anything. Any thoughts would be appreciated

Make sure the music or pictures are in the default Music and Pictures folders. That is the only way the 360 will recognize them.