Weird Home Network Problem

[apple2pomme]

Weird Home Network Problem

I have 3 PCs and a XBOX connected together via a router.
It was a SMC and then Trendnet. The behavior is the same.

They all installed with windows 2000 pro.
They all accessed with "administrator" without password
They all belong to 'workgroup'
3 PCs are PC1, PC2 & PC3

Here is the problem:

-1- They all have folders under "My Network Places"
=>"C on PC1", =>"C on PC2", =>"C on PC3"
because once they were connected together.

By clicking on any of them, that PC can be accessed.
No problem.

-2- BUT, with PC2 not turned on,
clicking on "=>My Network Places"=>"Entire Network"
=>"Microsoft Windows Network"=>"Workgroup"
Message box appears and shows"
"Workgroup is not accessible"
"The list of servers for this workgroup is not currently
available"

-3- At this time, XBOX's SAMBA can NOT access to either PC1
or PC3. Message appears "Workgroup access denied".

-4- When PC2 is turned on (physically not a particular PC,
not connected first either), every thing works fine.
PC1, PC2 & PC3 can be connected via the rout in -2-.

-5- At this time, XBOX can access without any PC problem.

I don't know what's wrong. How can I solve this problem?

Thanks.

Apple

 

[apple2pomme]

-6- I changed all 3 PCs service=>computer browser to automatic.
So, PCs can see each other without turnung on of PC2.
But it stil needs to turn on PC2 in order to let the XBOX's SAMBA

to access the PC3.