Mac to PC connection problem

Here's my problem. I've got a recent Imac running OSX 10.4, an old PC running
XP and a new PC running Vista. They are all on a network in the same
workgroup. I can connect to either PC from the Mac. I can connect to the
Vista and Mac from the XP. But the Vista machine can only connect to the XP
not to the Mac. All machines show up on each other's network windows. When I
try to connect to the Mac from Vista, I get a login box. All my logins fail.
The exact same logins work from the XP!

A few more details. The network is thru a Linksys WRT54G router. The Mac and
XP machines are wired to the network. The Vista machine is normally wireless
but I've also tried it wired. Firewalls are turned off everywhere. The Mac
is set for Personal File Sharing, Windows Sharing and Remote Login. Any
ideas.

LB.

I've got my own answer. Vista uses NTLM for password authentication. OSX and
XP don't. I needed to change the LmCompatibilityLevel in the registry

lb wrote:
> Here's my problem. I've got a recent Imac running OSX 10.4, an old PC
running
> XP and a new PC running Vista. They are all on a network in the same
> workgroup. I can connect to either PC from the Mac. I can connect to the
> Vista and Mac from the XP. But the Vista machine can only connect to the XP
> not to the Mac. All machines show up on each other's network windows. When
I
> try to connect to the Mac from Vista, I get a login box. All my logins
fail.
> The exact same logins work from the XP!
>
> A few more details. The network is thru a Linksys WRT54G router. The Mac
and
> XP machines are wired to the network. The Vista machine is normally
wireless
> but I've also tried it wired. Firewalls are turned off everywhere. The Mac
> is set for Personal File Sharing, Windows Sharing and Remote Login. Any
> ideas.
>
> LB.