Odd XP Vista Network Issue

I went through a lot of the problems I have seen here where the XP and Vista
computers can't see each other and such. Downloaded all the patches and set
all the permissions on both machines. Have full access XP machine to Vista.
Where my problem is, when I do discovery from the Vista machine, it detects
the XP machine as a "Media Device". I can play all of my music files on my
Vista system that are on the XP system, but I am unable to access any other
files on the XP system. I have the full C drive set as shared, but only the
media files show up across the network. Anyone else encounter this problem
and find a solution?