networking problem

[ati005]

i have a network consisting of

Linksys wireless router
cable modem
wired pc running vista
wireless sony laptop running vista
wireless acer laptop running xp

from pc i can only see the shared files on sony laptop
fron sony laptop i can see shared files only on acer laptop
from acer laptop i can see shared files only on sony laptop.

file sharing is enabled on all pcs but is not working properly. the workgroup is also called WORKGROUP on all the computers. it was all working ok before when i was running XP on the pc. ill also post the network maps.

Can anyone please help.

Sony Laptop Network Map

PC Network Map

 

[ati005]

also another question,
how can i reset the whole network, i.e. delete all connections, routers and make a new start.

and also on the sony laptop when it is connected to the router, it shows multiple network connections to the same router, why is this?

 

[dude_se]

first of all do you have firewalls on the computers?
secondly dont double post please

 

[ati005]

firewalls are on all computers but are not interfering and sorry for double post.