Network Printing and not connecting on one

[User Needs]

Hello All,

I've 4 wired PC's (2-Win XP Pro SP2)(2-Win XP Home SP2) at home.
Also at times 2-3 wireless. (WinXP Pro SP2).
And my setup is cable to a Belkin wireless router then to a 8 port D-link Gigabit switch.
All wired go through the switch.
My problem is, I've a Epson R200 network shared printer on one of the two Pro systems (Mine). The two home and wireless systems can all print to my printer.
The other Pro system can't, it's not even seeing my PC or the printer.
In fact it doesn't see any of the others.
It does have Internet access.

In Network places I can see but not access the system with the problem.
On the system with the problem, I do not see anything. And the error I get is,
Mshome is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permission.
The list of servers for this workgroup in not currently available


Any ideas? I'm at a loss!

Thanks for any and all help