windows xp "local security settings"

[mickey]

Hello,
I'm trying to do a thing that should be simple but not for me.
I have 2 pc in a local network. pc1 has a folder "shared" (but I think this is a secondary problem). The problem is that I don't kknow how access from pc2 to pc1.
Situation:

PC1                                       PC2
userA(with passwd)              userA (without pass)
userB (without pass)            userB (without pass)  
userC (without pass)            userC (without pass)

PC1                                       PC2
userA(with passwd)              userA (without pass)
userB (without pass)            userB (without pass)  
userC (without pass)            userC (without pass)

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In "local security settings" of PC1 I added userA, userB. For what I understand, I have to add the users from "local security settings" (the folder sharing is thing that comes after)...
Then from pc2 (and logged as userA) I try to access to pc1. cliccking, appers a mask
that asks me user and pass...It works only for userA. (and it seems ok)
I can't log on pc2 with userB. I try all combination: it works only with userA;
Any hints? Any links?
I'm sincer: I can't find a link that explains clearly this thing.
(for knowledge pc1 has xp pro; pc2 xp home; both with SP2 installed).

Sincerly,

[marcel]

You need passwords for the users of PC2 too, if you want them to connect from PC1.
This stands for RDP too.