Offline folders

I have 2 destop pc's and a laptop, that I keep for business, and on a PC I
have a shared folder for service manuals, time sheets, ect...
Until Saturday all 3 had XP Pro SP2, and PC's AM2, XP64, and Laptop C640 had
all access behind a Router/firewall with Shared folders, and offline folders
that sync'd to/from my laptop. On Friday, I upgraded the AM2 to a new MB,
CPU, and ram, and then did an inplace upgrade to the OS, to get the new
hardware recognized and drivers loaded. Since all three are all on the same
workgroup, I renamed the shares to a more logical naming so that first the PC
name, followed by the drive letter, then the shared name.
NOW.
I have updated the AM2 to XP SP3, the XP64 also, and wanted to do the laptop
also, but wanted to sync the folders first, but I needed to rename the shared
offline folders to reflect the new names, but from the sp2 laptop, the newly
renamed folders on AM2 don't show up in network neighborhood.

Summary:
Laptop c640 XPSP2 sees and accesses XP64 XPsp3 and all shared drives/folders
in Network neighborhood both ways.

PC AM2 XPsp3 sees and accesses XP64 XPsp3 and all shared drives/folders in
Network neighborhood both ways.

PC AM2 XPsp3 sees and accesses Laptop c640 XPSP2 and all shared
drives/folders in Network neighborhood both ways.

BUT Laptop c640 XPSP2 can only see PC AM2 XPsp3 and 1 OLD sharename but
nothing else.

I can use both IE, and Windows explorer and access all shared drives/folders
using the IP address.

WHY?
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Desktop Support
Kodak