XP and 2000 networking problem

i have a network with two XP Home and 1 Windows 2000 Pro
computers. i can view/share everything fine between XP
computers, and i can view everything from my 2000
computer. however, i cannot share anything on my 2000
computer and do not even see the computer on my local
network when i try to view it from either of my XP
computers.

my 2000 computer is wirelessly networked. any help is
appreciated. thanks.

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